For me, even with no plugins (I removed them to try to figure it out), a default baseplate, and after re-installing studio, it still has about a 1/15 chance to work properly on startup. Otherwise I can’t use studio tools and can have them all selected at once with nothing happening. Almost as if whatever handler they use should have printed an error, but hasn’t. They perform like a broken game GUI. F3X is the only way to get around this if it happens.