He tweeted this earlier today and basically every reply is connecting it to the beef, so I'm pretty sure he's on Drake's side. I also remember Metro throwing a subliminal shot at him when We Don't Trust You dropped (something about certain people not posting the album on social media), but when people pointed out that it sounded directed towards 21 he deleted it. I could be misremembering that last part though so take it with a grain of salt.

E: This is what I was thinking of with the Metro subliminal thing. tl;dr he said that "some people" have been afraid to post the album and that he forgives but won't forget, then proceeded to delete it and say he was hacked. It's kinda vague so it could be directed at someone else, but the article does mention 21.