Titlebar buttons placement is bugged
Titlebar buttons show up on the wrong place when the placement is set on the "Left" in Tweaks app. They should be showing up in the far left part of the titlebar near the left border where the search button is.
A similar one seems to be in the Gnome Tweaks app: gnome-tweaks#326 (closed)
And in the Gnome Tweaks app: gnome-tweaks#326 (closed)