Select 15-20 or more images in iOS Photos app > Export > Save to Files > select Dropbox or Google Drive. Expected behavior is that the selected files should be saved in the selected location. This used to work fine until recently, even for much larger batches. Lately (in iOS 13.x) I either see fewer photos being saved, or duplicates/triplicates, even more copies of a few photos saved. Not sure if the problem is in iOS 13.x, share extensions or in Dropbox and other cloud storage apps’ integration with iOS share extensions sheet.
Have tried with iPhone 8 and iPhone 6s using the latest public version of iOS, Dropbox and Google Drive. Haven't checked for other third-party cloud storage services.
Please see if you can reproduce this? Would appreciate any ideas on how to resolve this issue.