I was using the copycat action with the wrong token, that didn't had needed rights. The copying failed (file wasn't copied to the other repo), but the action terminated successfully. I would have expected the action to fail if the token hasn't got the rights needed.
I don't know if this is a bug, just wanted to leave this here, feel free to close this issue if this isn't of interest for you.

I was using the copycat action with the wrong token, that didn't had needed rights. The copying failed (file wasn't copied to the other repo), but the action terminated successfully. I would have expected the action to fail if the token hasn't got the rights needed.
I don't know if this is a bug, just wanted to leave this here, feel free to close this issue if this isn't of interest for you.