diff --git a/server/fastapi_app.py b/server/fastapi_app.py
index 78609b7..ba73e8c 100644
--- a/server/fastapi_app.py
+++ b/server/fastapi_app.py
@@ -379,7 +379,7 @@ def health():
     return {
         "ok": status["db_ok"],
         "ts": time.time(),
-        "api_build": "2026-06-16c",
+        "api_build": "2026-06-16d",
         **status,
         **elevation_status(),
     }
diff --git a/server/static/index.html b/server/static/index.html
index e793217..c210b9e 100644
--- a/server/static/index.html
+++ b/server/static/index.html
@@ -361,7 +361,7 @@
       { position: 'topright', collapsed: true }
     ).addTo(map);
 
-    const API_BUILD = '2026-06-16c';
+    const API_BUILD = '2026-06-16d';
 
     const markers = {};
     let selectedId = null;
@@ -560,10 +560,13 @@
     }
 
     function snapAtCursor(track, telemetryRows, cursor, roleFallback) {
+      const pos = trackPointAt(track, cursor);
+      if (pos?.meta && String(pos.meta).length > 2) {
+        const ts = timelineUseProgress ? null : cursor.t;
+        return snapFromTrackPoint(pos, ts, roleFallback || track?.role);
+      }
       if (timelineUseProgress) {
-        const pos = positionAtProgress(track?.points, cursor.progress);
-        if (!pos) return null;
-        return { meta: pos.meta, role: roleFallback, rssi: pos.rssi, ts: cursor.progress };
+        return snapFromTrackPoint(pos, null, roleFallback || track?.role);
       }
       return snapAtTime(track, telemetryRows, cursor.t, roleFallback);
     }
@@ -592,21 +595,42 @@
       return { ...track, points };
     }
 
-    function snapAtTime(track, telemetryRows, t, roleFallback) {
-      const tel = telemetryAtTime(telemetryRows, t);
-      if (tel) return tel;
-      const pos = positionAt(track?.points, t);
+    function normalizeTelemetry(rows) {
+      if (!rows?.length) return [];
+      return rows
+        .map(r => ({ ...r, ts: Number(r.ts) }))
+        .sort((a, b) => a.ts - b.ts);
+    }
+
+    function trackPointAt(track, cursor) {
+      if (!track?.points?.length) return null;
+      return timelineUseProgress
+        ? positionAtProgress(track.points, cursor.progress)
+        : positionAt(track.points, cursor.t);
+    }
+
+    function snapFromTrackPoint(pos, t, roleFallback) {
       if (!pos) return null;
       return {
         meta: pos.meta,
-        role: roleFallback || track?.role,
+        role: roleFallback,
         rssi: pos.rssi,
         ts: t,
         lat: pos.lat,
-        lon: pos.lon
+        lon: pos.lon,
       };
     }
 
+    function snapAtTime(track, telemetryRows, t, roleFallback) {
+      const pos = positionAt(track?.points, t);
+      if (pos?.meta && String(pos.meta).length > 2) {
+        return snapFromTrackPoint(pos, t, roleFallback || track?.role);
+      }
+      const tel = telemetryAtTime(telemetryRows, t);
+      if (tel) return tel;
+      return snapFromTrackPoint(pos, t, roleFallback || track?.role);
+    }
+
     function rxQualityFromMeta(meta) {
       if (!meta) return null;
       const snap = RadioUI.parseRadioSnapshot(meta);
@@ -1847,18 +1871,17 @@
 
     function telemetryAtTime(rows, t) {
       if (!rows?.length) return null;
-      const first = rows[0];
-      const last = rows[rows.length - 1];
-      if (t <= first.ts) return first;
-      if (t >= last.ts) return last;
-      for (let i = 0; i < rows.length - 1; i++) {
-        const a = rows[i];
-        const b = rows[i + 1];
-        if (t >= a.ts && t <= b.ts) {
-          return t - a.ts <= b.ts - t ? a : b;
+      const tNum = Number(t);
+      let best = null;
+      let bestD = Infinity;
+      for (const r of rows) {
+        const d = Math.abs(Number(r.ts) - tNum);
+        if (d < bestD) {
+          best = r;
+          bestD = d;
         }
       }
-      return last;
+      return best;
     }
 
     function telemetryFromTrackPoint(track, t, roleFallback) {
@@ -1890,9 +1913,21 @@
       return bestD === 0 ? best : null;
     }
 
+    function trackMetaDiversity(points) {
+      const packets = new Set();
+      let withMeta = 0;
+      for (const p of points || []) {
+        if (!p.meta || String(p.meta).length < 3) continue;
+        withMeta++;
+        const snap = RadioUI.parseRadioSnapshot(p.meta);
+        if (snap.packet != null) packets.add(snap.packet);
+      }
+      return { withMeta, uniquePackets: packets.size, total: points?.length || 0 };
+    }
+
     function pairedTelemetryAtTime(txTrack, rxTrack, telemetryTx, telemetryRx, t) {
-      let txTel = telemetryAtTime(telemetryTx, t) || telemetryFromTrackPoint(txTrack, t, 'TX');
-      let rxTel = telemetryAtTime(telemetryRx, t) || telemetryFromTrackPoint(rxTrack, t, 'RX');
+      let txTel = snapAtTime(txTrack, telemetryTx, t, 'TX');
+      let rxTel = snapAtTime(rxTrack, telemetryRx, t, 'RX');
       const txSnap = txTel ? telemetryToSnap(txTel) : null;
       const rxSnap = rxTel ? telemetryToSnap(rxTel) : null;
       if (txSnap?.packet != null) {
@@ -2211,6 +2246,12 @@
           noteText =
             'Треки не пересекаются по времени — шкала на полном диапазоне; вне записи позиция удерживается на краю.';
         }
+        const txDiv = trackMetaDiversity(loadedTxTrack.points);
+        const rxDiv = trackMetaDiversity(loadedRxTrack.points);
+        if (txDiv.uniquePackets <= 1 && rxDiv.uniquePackets <= 1
+            && (txDiv.withMeta > 1 || rxDiv.withMeta > 1)) {
+          noteText += ' Радио-статистика в точках трека не менялась при записи.';
+        }
         applyTimelineRange(range, noteText);
       }
       setTimelineVisible(true);
@@ -2227,7 +2268,7 @@
             `/api/telemetry?device_id=${encodeURIComponent(loadedSingleTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`,
             { cache: 'no-store' }
           );
-          if (res.ok) telemetrySingle = await res.json();
+          if (res.ok) telemetrySingle = normalizeTelemetry(await res.json());
         }
         updateTimelineAtSingle(timelineCursor());
         return;
@@ -2240,8 +2281,8 @@
           fetch(`/api/telemetry?device_id=${encodeURIComponent(loadedTxTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`, { cache: 'no-store' }),
           fetch(`/api/telemetry?device_id=${encodeURIComponent(loadedRxTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`, { cache: 'no-store' })
         ]);
-        if (telTx.ok) telemetryTx = await telTx.json();
-        if (telRx.ok) telemetryRx = await telRx.json();
+        if (telTx.ok) telemetryTx = normalizeTelemetry(await telTx.json());
+        if (telRx.ok) telemetryRx = normalizeTelemetry(await telRx.json());
       }
       updateTimelineAt(timelineCursor());
     }
@@ -2326,7 +2367,7 @@
           `/api/telemetry?device_id=${encodeURIComponent(loadedSingleTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`,
           { cache: 'no-store' }
         );
-        if (telRes.ok) telemetrySingle = await telRes.json();
+        if (telRes.ok) telemetrySingle = normalizeTelemetry(await telRes.json());
         updateTimelineAtSingle(timelineCursor());
       }
       document.getElementById('trackInfo').textContent =
@@ -2387,8 +2428,8 @@
           fetch(`/api/telemetry?device_id=${encodeURIComponent(loadedTxTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`, { cache: 'no-store' }),
           fetch(`/api/telemetry?device_id=${encodeURIComponent(loadedRxTrack.device_id)}&since=${range.min}&until=${range.max}&limit=500`, { cache: 'no-store' })
         ]);
-        if (telTx.ok) telemetryTx = await telTx.json();
-        if (telRx.ok) telemetryRx = await telRx.json();
+        if (telTx.ok) telemetryTx = normalizeTelemetry(await telTx.json());
+        if (telRx.ok) telemetryRx = normalizeTelemetry(await telRx.json());
         updateTimelineAt(timelineCursor());
       }
 
diff --git a/server/static/radio-ui.js b/server/static/radio-ui.js
index b6bef6b..3bdeea6 100644
--- a/server/static/radio-ui.js
+++ b/server/static/radio-ui.js
@@ -116,8 +116,10 @@
 
   function renderCompareGrid(txSnap, rxSnap, txId, rxId, changedTx, changedRx, staticOpen) {
     let html = '<div class="radio-compare-grid">';
-    html += `<div class="radio-compare-head"><span class="legend-tx">TX</span> ${escapeHtml(txId || '—')}`;
-    html += `<span class="legend-rx">RX</span> ${escapeHtml(rxId || '—')}</div>`;
+    html += '<div class="radio-compare-head">';
+    html += `<span><span class="legend-tx">TX</span> ${escapeHtml(txId || '—')}</span>`;
+    html += `<span><span class="legend-rx">RX</span> ${escapeHtml(rxId || '—')}</span>`;
+    html += '</div>';
     for (const row of DYNAMIC_ROWS) {
       const txCls = changedTx && changedTx.has(row.key) ? ' changed' : '';
       const rxCls = changedRx && changedRx.has(row.key) ? ' changed' : '';