diff --git a/Plugin/unraid/include/ai_chat.php b/Plugin/unraid/include/ai_chat.php
index 755aef9..9ee3886 100644
--- a/Plugin/unraid/include/ai_chat.php
+++ b/Plugin/unraid/include/ai_chat.php
@@ -1856,12 +1856,23 @@ vv_ai_profiles_script();
       return b.offsetHeight + m;
     }
 
+    // Returns the height it just applied, in pixels, or null when that is not a number this side
+    // can know — a placement sized in vh resolves only against the viewport, and one that has not
+    // been given heights yet has nothing to report.
+    //
+    // It reports rather than letting the caller measure because .vv-ai-chat transitions its height
+    // (see the rule in the stylesheet). offsetHeight read straight after this returns the height
+    // the box is animating FROM, not the one just asked for, and a page that sizes a sibling from
+    // that figure sizes it for a dock that no longer exists by the time anyone looks. On the
+    // Scheduler that left the panel's bottom third dead: the view was cut short for a tall dock,
+    // the dock then shrank to its collapsed share, and nothing re-measured — so the gap survived
+    // until an expand/collapse fired onResize and ran the fit again against a settled box.
     function applyHeights() {
       const el    = chatEl();
       const base  = el.dataset.h || '';
       const med   = el.dataset.hTall || '';
       const big2  = el.dataset.hLarge || med;
-      if (!base || !med) return;
+      if (!base || !med) return null;
       const want = big ? (large ? big2 : med) : base;
       // Subtracted, not added to. The height the page asked for is the height the whole window
       // keeps; the list is taken out of the conversation's share of it. calc() because that height
@@ -1891,6 +1902,12 @@ vv_ai_profiles_script();
                                     : 'Expanded is medium — click for large';
         sizeBtn.classList.toggle('vv-ai-grow-on', large);
       }
+
+      // Only a plain pixel figure can be resolved here; anything else is left to the caller to
+      // measure, which is correct for the placements whose height is not a transitioning number.
+      const n = parseFloat(want);
+      if (!Number.isFinite(n) || !/^\s*[\d.]+px\s*$/.test(want)) return null;
+      return k ? Math.max(56, n - k) : n;
     }
     // Named functions, because the buttons are no longer the only way in — the shortcuts below
     // drive the same two.
@@ -2071,11 +2088,13 @@ vv_ai_profiles_script();
       // Heights supplied after the fact, for a placement whose room is a share of a panel rather
       // than a constant. Re-applies immediately at whichever of the two states is current, so a
       // resize while expanded stays expanded instead of snapping back.
+      // Hands back the pixel height it settled on, so a caller sizing a sibling from it does not
+      // have to measure a box that is mid-transition. See applyHeights().
       setHeights(base, tallMed, tallLarge) {
         const el = chatEl();
         el.dataset.h = base; el.dataset.hTall = tallMed;
         if (tallLarge) el.dataset.hLarge = tallLarge;
-        applyHeights();
+        return applyHeights();
       },
 
       // Same contract, different subject — the Scheduler pointing the chat at another script, log
diff --git a/Plugin/unraid/pages/scheduler.php b/Plugin/unraid/pages/scheduler.php
index a7e8400..b1d6405 100644
--- a/Plugin/unraid/pages/scheduler.php
+++ b/Plugin/unraid/pages/scheduler.php
@@ -1262,6 +1262,7 @@ function vvFitRight() {
   // the same 1:2 relationship, or on a very short viewport the two states would clamp to the same
   // number and the control would appear to do nothing.
   const dock = document.getElementById('vv-ai-dock');
+  let dockH = dock ? dock.offsetHeight : 0;
   if (vvSchedChat && dock) {
     // The share is of the transcript, but what the panel has to find room for is the whole
     // assistant — composer, control row, padding. Measured rather than assumed, because it is a
@@ -1274,12 +1275,21 @@ function vvFitRight() {
     // discussed on screen too; a chat that covers it entirely is not worth the room it took.
     const VIEW_MIN = 90;
     const room = Math.max(60, availH - VIEW_MIN - chrome);
-    vvSchedChat.setHeights(Math.min(room, Math.max(52,  Math.round(availH * 0.10))) + 'px',
-                           Math.min(room, Math.max(100, Math.round(availH * 0.20))) + 'px',
-                           Math.min(room, Math.max(140, Math.round(availH * 0.40))) + 'px');
+    const applied =
+      vvSchedChat.setHeights(Math.min(room, Math.max(52,  Math.round(availH * 0.10))) + 'px',
+                             Math.min(room, Math.max(100, Math.round(availH * 0.20))) + 'px',
+                             Math.min(room, Math.max(140, Math.round(availH * 0.40))) + 'px');
+    // Taken from what setHeights() reports, not from measuring the dock again. The transcript
+    // animates its height, so offsetHeight here returns what it is animating away from — a figure
+    // that was right a frame ago and is wrong by the difference between the two states. Sizing the
+    // view from it cut the view short and left that difference as dead panel below the dock, which
+    // only an expand/collapse cleared because that is what ran the fit again once the box settled.
+    //
+    // chrome is safe to have measured against the same animating box: it is the difference between
+    // the dock and the transcript inside it, so the moving term cancels out of the subtraction.
+    if (applied != null) dockH = chrome + applied;
+    else                 dockH = dock.offsetHeight;
   }
-  // Measured after the heights are applied, so this reads the clamped height, not the natural one.
-  const dockH = dock ? dock.offsetHeight : 0;
   const contentH = Math.max(80, availH - dockH);
   if (pre.style.display !== 'none') {
     pre.style.maxHeight = 'none';