What’s the bug you’re trying to show?
My guess is the main window getting smaller when a dialog opens. - Creation dialog resize Defold main form. · Issue #7814 · defold/defold · GitHub
If I’m right, the current best workaround is to not maximize the window using “maximize” but to resize it to your screen size manually. Vampiloup posted it on the forum a while back and it’s worked great.
Edit: Also if I’m right do you mind telling me what DE you’re using?