Hopefully WL11 should improve matters for you - as usual with SB the trial edition will be out in a few weeks.
Decided not to wait for the trial but purchased the update. After some quick testing it seems clear that one should not try to directly open WL10 montages or even single audio files which appear in the Recent view of WL11. They will not play back nicely, if at all - at least for me they didnāt.
I then tried another approach. I did not yet have time to recreate the montage Iāve been working on lately but opening a single audio file afresh worked. I can get sound. However the playhead does not move at all when the audio starts playing (no matter what I choose for the scrolling options). Upon launching WL11 for the first time I got asked whether I would want to import WL10 settings. Maybe I shouldnāt have opted for the WL10 settings to be carried over.
Well, decided to uninstall WL11 and install again. This time opted not to import the WL10 settings. Now opening a single audio file works ok and the playhead also moves as it should. Need to do further testing with plugins and the whole setup.
So, I think it seems like a wise approach to start afresh with WL11 and not import any settings from WL10.
Edit:
BTW, Softube Tape plugin reels now roll quite nicely in WL11 which they never did in WL10. I hope this is a sign of better overall performance of the GUI (and also audio side) in WL11.
Maybe something special in your config, but this should work. I do this often.