Hello,
I just experience this bug when open spine 4.2.37, previous versions (like 4.2.36) are normal
UI being really weird, cannot move the window (because there is no top bar to click and drag), some text is cropped and button is kinda offset position (The button is not able to click, I have to click a distance under the button to hit it)
Missing top bar, include window bar with minimize/maximize/close buttons and tab bars with tab titles (Here are some pictures to compare 4.2.36 and 4.2.37)