Drag and drop issue with Universal Control after iPadOS 26 update

I updated both my iPad (26) and my MacBook(Tahoe 26) yesterday, and since then, the drag and drop feature doesn't work anymore. Or it gets "stuck" on the side of the iPad screen, or it resizes the window.

Does anyone else have the same problem? Or did someone find out how to fix it?

I tried with the options "app in full screen size", "windowed", and "stage manager".

It does the same whether I use the trackpad of the Magic Keyboard or if I use the keyboard of the MacBook.

[Re-Titled by Moderator]

Original Title: Universal control Ipados 26