After Effects version 17.0 shows second, moved window when playing the sequence


So when I want to see what I just created, AfterEffects "opens" a second window to show my animation. The window pops up anywhere in my composition, depends on how far I zoomed in or out.. It's really annoying and disturbs my workflow. Any guesses how to fix that? I already reinstalled, updated my mac etc. but nothing helped out. Thanks for your help!
Title edited by Mod.