1) wavesynth tự phát khi mở app: probe calibrate() render vào live mix
(renderAll process cùng instance) -> thêm calibratingCh_[16], renderAll
bỏ qua channel đang calibrate; plugin_host panic (sustain off + all
notes off + 128 noteOff) ngay sau preset apply để startup im lặng.
2) bấm GUI mở 2 cửa sổ Qin: sandbox VST2 child tự sở hữu top-level window
-> ownsGuiWindow() + main.cpp forward OPEN_GUI control, không tạo native
parent / không registry double-open.
3) play phát nhạc cụ sai: restore clobber — seed preset đè patch thật trong
state file (ch3 63ba3667 -> 7f07473c) do saveStateJob chạy lúc child còn
seed. Fix: queuePreset(waitApply=true) chờ child apply xong (presetOut
memcmp), consume-before-apply (zero presetInLen trước khi apply), deferred
double-load re-check trong main.cpp skip assign trùng path, watchdog
respawn re-queue lastPreset_.
- LOAD job posts WM_CLOSE to window created on main thread (DestroyWindow from worker crashed 0xc000041d, muting all tracks)
- handleOpenGui + attach jobs skip when Vst3Instrument::hasAttachedView() (state_ && guiAttached_)
- attach failure posts WM_CLOSE; post_close_gui erases entry only when it points at the same hwnd
- cap openVstGuiRetry at 5 to stop frontend retry spam
- Close other channels' editor windows before attaching a new one (Option B)
- needsReload()/setReloading() guard: skip processAudioBlock during
terminate+reload teardown to avoid UAF/hang when reopening GUI
- Wait for editor registry cleanup (5s timeout) before creating window
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