Playline Bug and track selection bug

[Blacksymphony 22]

I've updated to the newest version,and I noticed a bug of play line 

some times the play marker can not follow the play line poperly,I have to restart cakewalk to bring it back to normal.

 

 

and the track selection bug is still exist in 2019.5 build 31,track selection always jump to the first one automaticly.and it's related to some certain project file.