On Wayland if You drag an image onto the GIMP window, specifically into the layers panel KDE just... stops. Not even the cursor moves. I don't know why it happens but its consistent on both my machines.
Just tested on a fresh installation in a VM, easily reproducible
Can't repro this on Plasma 6 dev Operating System: Fedora Linux 40 KDE Plasma Version: 6.1.80 KDE Frameworks Version: 6.4.0 Qt Version: 6.7.1 Kernel Version: 6.8.11-300.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 3600 6-Core Processor Memory: 15.5 GiB of RAM Graphics Processor: AMD Radeon RX 6600 Can you share more information of your system, like I have listed above?