Panel: selecting multiple blocks isn't possible in Fedora Linux

When using Fedora Linux 37 and Firefox, it’s seems not possible to select multiple blocks in the Panel. I installed the same OS on another computer and the problem remains. On other Linux distributions (Manjaro and Pop OS!), copying and pasting multiple blocks works as expected.

I’am aware that this is not a Kirby CMS error but i hope that someone experienced the same problem with Fedora and knows how to fix it?