Reclaim drain owns its work: invalidation only bumps a generation, and a generation that moved aborts the tick's commit and its release.

src/app/main.cpp

@@ -189,7 +189,10 @@ static void OnTimer()
     // this timer mid-apply), same retry-next-tick shape as the consume guard below.
     // Deferred WHOLE, not just the reload branches: poll()'s identity tracking is
     // cheap to skip for one tick and resumes correctly, unlatched, on the next.
-    if (!reasampler::modeApplyInProgress()) g_session.poll();
+    // The reclaim drain is latched for the same reason and is the same window: it
+    // holds that view model for the length of a plugin unload, which pumps.
+    if (!reasampler::modeApplyInProgress() && !reasampler::fxReclaimDrainInProgress())
+        g_session.poll();
 
     // persist stays MODEL-ONLY (loads the saved view model but does not apply
     // visibility, to avoid coupling persist to the view shell); poll() raises a
@@ -198,11 +201,12 @@ static void OnTimer()
     // signal re-arms the bank panel's new-content detector — notified BEFORE the
     // reapply so re-arm and model restore ride the one load event (otherwise
     // pre-existing tracks can be mis-detected as "new" and mass-tagged).
-    // modeApplyInProgress is tested BEFORE the consume, not after the applyMode call:
-    // the load signal is one-shot, a re-entered applyMode fails closed, and a reapply
-    // dropped here is the saved mode never applied at all. Holding the whole block
-    // back one tick also keeps the panel re-arm ahead of the reapply.
-    if (!reasampler::modeApplyInProgress() && g_session.consumeLoadSignal()) {
+    // Both latches are tested BEFORE the consume, not after the applyMode call: the load
+    // signal is one-shot, a re-entered applyMode fails closed, and a reapply dropped here
+    // is the saved mode never applied at all. Holding the whole block back one tick also
+    // keeps the panel re-arm ahead of the reapply.
+    if (!reasampler::modeApplyInProgress() && !reasampler::fxReclaimDrainInProgress() &&
+        g_session.consumeLoadSignal()) {
         reasampler::bankPanelNotifyProjectLoaded();
         // Reconcile lane ownership against the live project's lanes (P_LANENAME,
         // the cross-session source of truth) BEFORE reapplying visibility. Never