I had the same problem till I realised you can't drag more patches than the bank you are moving them to can hold, they will not populate on to the next bank, and so will not complete the operation.
Ah, if only it were that simple!
So I am only ever trying to drag and drop 96 patches at a time, which is enough to fit a single bank. However, even if I try to drag a single patch from one of the Arturia banks, it doesn't work. This issue seems very much tied to those
7 extra Arturia banks that they supply free on their site.
What does seem to work (so far) is sending all the Arturia banks to the PB, remove all other patches, then Save As Project. So far, this is the only method that seems to work, albeit a bit laborious.
Another thing I noticed that leads me to believe these particular banks are somehow "restricted" is that if you select one of the patches from those banks in the search results pane, the SAVE and DELETE buttons are missing from the preset details (
see attached examples), top right. I think that because these banks are installed from an installer rather than through the regular import process, and because they require the user to sync their ASC before they can be used, that there is some kind of 'protection' that also limits their use in the Project aspect of PBC.
Weirdly, the Factory presets are also missing the SAVE and DELETE buttons, but these can be added to a Project without any issue.
I think we need someone from Arturia to check this out. Is there a way to 'summon' them to a post or do we have to wait for them to see it?