Audio slightly delayed in rare cases
It happens occasionally and unfortunately I cannot reproduce it in a sample Qtractor session. I can't reproduce it reliably in my existing sessions, either.
Sometimes the playback of audio (I think it's all audio tracks to the same amount) is a bit delayed compared to midi tracks with instrument plugin. Mostly I encounter it while wildly positioning the playhead while playback is running but it can also happen at first play after having loaded a session. I can't recognize any systematics. I have no xruns.