Question Running into a mouse-click bug on Linux, need a workaround

I have run into this bug https://forum.unity.com/threads/registercallback-clickevent-triggers-twice-on-linux-only.1111474/ which results in two click events on Linux version of Unity.

I tried the mentioned work-around but it did not work for me, I assume the internals have changed since the original post.

Does any one know of a working (on Unity 2021.2.0b14) work-around for this issue?