Check if any of your movies have special characters (characters such as Ö, È, etc.) in the name (non-English movies perhaps?). Kodi v19 (Matrix) has an issue with special characters. Quick way to test is to add a few select movies you have verified not having any special characters and see if the crashing occurs. I had one such movie in my Leia based library and when I upgraded to Nov update it kept crashing until I fixed the offending filename. NFO files (if you use them) can still have special characters in the title tag so the name displays correctly in the GUI.
See below: