[itsme]

It works for me, at least with songs that are already in my library
MSP 2.8.7
Win 10 1903 Build 18362.592

And how about the crashing? 
Pick a file with more than one pages, select manual cropping, edit, then press next page (to proceed to the next page that you want to manually crop).

What do you mean with "select manual cropping"? On the import dialogs there's a check box "Automatically crop pages", when I click on a song and select the icon bottom left there's a menu entry "Crop", in the crop dialog there's "Auto-Crop". The behaviour is as always, just the look of the movable cropping lines has changed. I can use it without issues. No matter if I change the cropping or not, also on multi-page songs.
It might be helpful for Mike to describe your workflow that leads to the crash step by step in detail.