I have been at it for sooo lon. Probably a decade… I have given up though. Even though I have given them a report (several times) on how to get aroud it. In the hopes that they would really look into it.
Anyway, here is a workaround… I have no time for a long explaination now, but the trick is:
To NOT use the Comp Tool to split the files (within the open lanes)… If you use the good old Scissors Tool (or Alt + left click) to split the files, and then select your bits (with the Comp Tool)… All the tracks included in that Folder/Edit Group will choose the same lane selections.
When you get the hang of it (and trust it) you don’t have to open the lanes across all the multitracks.
That said… for multitracking drums I tend to use the Track Versions instead.
PS. Try on some test/backup projects before going at it… I have found this to work well.