Name of layers are duplicated when drag and dropping in Manage layers

[forteller]

Describe the bug
When dragging and dropping a layer in the Manage layer pane, the name and the buttons gets duplicated if you are not able to drag and drop in a straight line, but rather steer a bit to the left. The duplication of the name carries over to other places where you can see the name of the layer.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://umap.openstreetmap.fr/no/map/uavhengige-sjapper_859787
2. Click on Manage layers
3. Drag and drop a layer up or down, and a little bit to the left
4. See the duplication
5. Do it again as many times as you like to see it duplicate again
6. Click to edit the layer
7. See that the name field is filled with the name duplicated as many times as you d'n'd

Expected behavior
Nothing should happen except for the reordering of the layer

Screenshots

Desktop (please complete the following information):

• OS: Nobara Linux 30
• Browser Firefox
• Version 132.0.1

Thank you very much for your work!