I know this has been asked before but I have never solved the problem.

I always have space bar set to "play from current position" and "pause until midi or key received" is selected. I have usually been able to double click on any bar and then start the play by pressing the first keyboard key. This still works but now the double click also sounds once the first notes for any midi tracks in the style. Sometimes the notes are also held continuously until I press stop. If I single click then press space bar instead of a double click the notes don't sound but is less convenient and never used to be necessary.
This is what I have tried without solving the problem.
1) Wired and wireless mice plugged into laptop (not via hub) also laptop touch pad.
2) Mouse click speed adjustment as per Win10 options.
3) Software synth plus two different hardware synths -I normally use a hardware synth.
4) ASIO and MME drivers.
5) Only happens if there is at least one midi track in a style and is not style-dependent. It never happens for RTs.
6) Freeze/unfreeze makes no difference.

The problem is also very intermittent and has happened occasionally with earlier versions of BIAB (I am using 2020/713) Just when I think it has gone away it starts again for no apparent reason.

Any ideas?
Tony