I'm unable to move and/or copy Document sets from a library to another library on the same site. When I select Move-To/Copy-To the current library is selected automatically and I'm unable to select another library.
How it looks:
If I test on a normal folder in the same library:
The library is quite large ~50000 files and a size of ~40 GB. The average Document set is between 200 to 500 MB. I've created a couple of views that narrows the items down to 100 to 200 items that I want to copy, however that does not help.
What could be restricting the possibility to copy these Document sets to another library?