Windows 10, PM+ 4257. Two minor issues.
If I go to preferences, contact sheet tab, and change the "Combine RAW + JPEG into ..." checkbox, the change doesn't take effect until I close and then reopen the contact sheet; F5 doesn't do it. (This may well be the case in PM as well; I don't think I've ever tried it before.)
My preference is to only include the RAW files in the catalogs. If I catalog the RAW files, but not the JPEGs and then choose to view combined thumbnails in the contact sheet, the contact sheet shows open circles rather than green circles. I understand the logic of whats going on, but it has the consequence that I can't tell (easily) whether the RAW file is cataloged or not. Would you please consider implementing a half filled circle for this case. And, if you really wanted to get fancy, which half of the circle was filled would indicate whether it was the RAW or JPEG that was cataloged.
(Note that I am assuming that the RAW and JPEG are separate entities in the catalog. If this is not the case, then I may want to rethink my approach.)