diff --git a/server/public/home.html b/server/public/home.html
index 42c7142..43fc85d 100644
--- a/server/public/home.html
+++ b/server/public/home.html
@@ -1140,7 +1140,7 @@
 </head>
 <body>
 <script src="/icons.js?v=6"></script>
-<script>window.__BUILD='2026-07-19-batch122';console.log('%cBiz Connect','color:#1F3B73;font-weight:bold','build '+window.__BUILD);
+<script>window.__BUILD='2026-07-19-batch123';console.log('%cBiz Connect','color:#1F3B73;font-weight:bold','build '+window.__BUILD);
 // Emoji are rendered with the OS's own (colour) emoji font — instant, zero network.
 //
 // We used to run Twemoji over every emoji, which swapped each one for an <img> pulled INDIVIDUALLY from
@@ -2700,7 +2700,7 @@ function updateBubble(m){
 // Floating date pill (updates to the day at the top of the viewport) + jump-to-latest button.
 function onMsgsScroll(){
   const box=document.getElementById('msgs'); if(!box) return;
-  if(box.scrollTop < 120 && _hasMoreOlder && !_loadingOlder && Date.now()>_olderCd) loadOlder(); // near the top → pull in older history
+  if(box.scrollTop < 700 && box.scrollTop >= 0 && _hasMoreOlder && !_loadingOlder && Date.now()>_olderCd) loadOlder(); // pull older history EARLY (while still scrolling down, before the rubber-band top) so the prepend+anchor never interrupts momentum; skip negative (rubber-band) scrollTop
   const nearBottom=(box.scrollHeight - box.scrollTop - box.clientHeight) < 120;
   const jl=document.getElementById('jumpLatest'); if(jl) jl.style.display=nearBottom?'none':'grid';
   const fd=document.getElementById('floatDate'); if(!fd) return;
@@ -2908,10 +2908,18 @@ async function openConvo(kind,id){
     const inp0=document.getElementById('msgInput'); if(inp0 && !isMobileUA()) inp0.focus(); // #2: don't auto-open the phone keyboard on chat open
     return;
   }
+  const _sig=(a)=>((a&&a.length)||0)+'|'+(((a&&a[a.length-1])||{}).id||'')+'|'+(((a&&a[a.length-1])||{}).edited_at||'');
+  const _prevSig = _convoRevealed ? _sig(THREAD) : null; // signature of what the cache render already shows (before we overwrite)
   THREAD=msgs;
   THREAD_CACHE.set(ckey, THREAD.slice());
   _hasMoreOlder = msgs.length >= PAGE; _loadingOlder=false; // a full page back means there may be older history
-  afterOpenSlide(()=>{ if(selected&&selected.kind===kind&&selected.id===id) renderThread(); }); // defer the network re-render past the slide (no 40-bubble innerHTML into the compositing layer mid-transform)
+  // If the network result matches what the cache render already painted, DON'T rebuild the DOM at slide
+  // end (that innerHTML+paint was the ~60-130ms hitch the device log showed). Just keep it pinned.
+  if(_prevSig!==null && _sig(msgs)===_prevSig){
+    afterOpenSlide(()=>{ if(!(selected&&selected.kind===kind&&selected.id===id)) return; const b=document.getElementById('msgs'); if(b && !b.querySelector('.new-sep') && (b.scrollHeight-b.scrollTop-b.clientHeight)<1200) b.scrollTop=b.scrollHeight; });
+  } else {
+    afterOpenSlide(()=>{ if(selected&&selected.kind===kind&&selected.id===id) renderThread(); }); // content changed → re-render, but only after the slide
+  }
   if(kind==='dm') syncDmRowTick(id); // #1: keep the sidebar tick consistent with the loaded thread
   // #3: if there were unread messages, drop a "New messages" divider, scroll to the first unread,
   // and show the "jump to newest" arrow so the user can return to the bottom.
