Can´t drag and drop in one app, can in another app

I have the apps Notepad++ and PDF x-change editor in the same bottle, made with the Apps template. In Flatseal, I gave Bottles permissions on my /home and some other places and dragging files to Notepad++ works jut fine. But dragging pdf files from the same locations onto PDF x-change editor doesn´t. The icon just kinda bounces back when I drop it.
If i run PDF x-change with a Bottles terminal, I see the following, although it doesn´t seem relevant. The last two error messages seem to appear randomly, not when I drop files on the app.

wineserver: using server-side synchronization.
wine: RLIMIT_NICE is <= 20, unable to use setpriority safely
002c:err:wineboot:process_run_key Error running cmd L"C:\\windows\\system32\\winemenubuilder.exe -r" (2).
01a8:err:ole:CoUninitialize Mismatched CoUninitialize
01e0:err:ole:CoUninitialize Mismatched CoUninitialize

any help?