Importing multiple files in iPad -- bug

When I try to import several files (from Dropbox) on my iPad Pro (OS 16), I see the download progress but then a little wheel starts spinning and the “File window” becomes white. Closing MN3 does not help. I have to restart my iPad. This happens every time. (Importing a single file works fine).

Importing files one by one is laborius, because MN3 does not remember the last folder location and it does not appear in “Recently Used” (I think that’s another bug) and of course there is no real search functions within Dropbox, so it takes a lot of scrolling and clicking to get to my DB folder again.