I've begun to experience consistently duplicated device events for both my keyboard and mouse on X11, and I've tracked down the PR that introduced this bug: #2195. The events are somehow completely identical, even down to the device id, which seems very strange to me.

I tried to check if it is a known issue with X.Org, but their GitLab instance refuses to serve a working website, and I spent some time trying to fix it on my own to no avail.

cc @chrisduerr