when I go to preview my comp after opening my after effects file, it will preview ONCE and then the space bar won't work again NOR will clicking play in the preview panel or anything. I've tried changing shortcuts, etc. and the preview still only works once.
If I understand it correctly, the Space bar key and the Play button work just fine for the first time, right?
Have you tried resetting AE preferences?
Which OS are you on?
Just reset them and it seems to work now! I went to the sync settings and cleared settings. Hope it sticks! Thank you!
Happy to help