Created attachment 161296 [details]
Reproduction of the bug as demonstrated in the video attached.

SUMMARY
***
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***

On a Wayland session, when dragging an image and dropping it into the Layers panel from a file manager / outside GIMP, the "dropping image as new layer" action repeats itself for a few times, filling up system memory and (potentially) crashing the running DE/WM. Reproduction of the bug was attempted in an X11 session, unable to reproduce the bug. Also cannot be reproduced in GNOME.

Further details: KDE 5.27.7, KDE Frameworks 5.109.0

STEPS TO REPRODUCE
1. Open an image normally in GIMP.
2. Outside GIMP, drag another image and drop it on top of existing layers in the Layers pane.
3. Action repeats several times over in rapid succession, filling up system RAM and potentially crashing the running DE/WM.

OBSERVED RESULT
Action repeats several times over in rapid succession, filling up system RAM and potentially crashing the running DE/WM.

EXPECTED RESULT
Image dragged and dropped onto the Layers pane will open as a new layer once.

SOFTWARE/OS VERSIONS
Windows: -
macOS: -
Linux/KDE Plasma: OpenSUSE Tumbleweed (20230823), Linux 6.4.11
(available in About System)
KDE Plasma Version:  5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
Reproduction of the bug as demonstrated in the video attached.