Why is the mouse cursor treated that wrong?

Hi there,
I just compiled the editor on archlinux because I can not find a pre compiled version for linux. I did not get any errors on compilation. When I click somewhere in the editor a point way more to the upper left is selected. I chose the “Top Down template” when clicking in the m of template for example the block to the left of the player gets selected. Every other click gets recognized the same way more to the left and up than I clicked. Also my mouse cursor jumps to that new position without moving it. 100% reproducable. Clicking anywhere outside the “game window” where I can see what I guess would be the game is not recognized at all. I can click nothing outside of that window, not the Icon tour, not the file menu, not the content browser, nothing happens anywhere at all.

How to fix this? How can I get started using the unreal editor on linux?

After posting this I tested some more seeing the content editor is clickable and showing my bug(after clicking the cursor jumps, clicking again makes it jump again):