Context drop down chevron didn't work (only on MS Surface)

On I can’t use the drop down chevrons.
They are shown directly after loading the page.
As I know they should only be visible at mouseover.
2023-06-29 14_10_48-Clipboard

Interesting is that I recognice this behavior on MS Surface devices only.
On other notebooks or virtual machines it works like a charme.

We are using the latest MS Edge Chromium or Firefox.

This behavior hits us on our internal jenkins installation also.
Any ideas?

I found out that this behavior comes around if the Surface keyboard is not connected to the device.
If the keyboard is connected the site works like a charme.

Is it possible to get a workaround for this?