I tried version 0.6.5 in Ubuntu 20.04 and it opens at a window size that goes off my screen. It can’t resize it and it doesn’t even have a maximize button.
On Windows I don’t have the window size errors but the drawing tool keeps getting changed every time I right click to drag the screen. It was a minor annoyance but it doesn’t happen in 0.6.4.
I have just gone back to 0.6.4 for the time being as it is pretty stable and works great on Windows and Linux.