Wayland: Opening windows jumping

[lischilpp]

When opening a new window inside a Wayland session, the window first appears aligned with the left screen edge and then jumps to its correct position.

On Xorg it appears correctly.

[pemmoura]

Sometimes new windows do not move to their positions, space is allocated for them, but they are not moved. Moving them a little bit seems to adjust things.

I'm trying to debug the extension, but I haven't been able to enable logging, if someone knows how to enable it, it would help.