tbh it seems like he faked the spell, and was teaching peter a lesson, based on what seemed to be a conversation moments later at 2:18 where he told him the problem was him trying to live two lives. probably lecturing him to just accept who he is and that people are going to know and find out.
the comments about messing with space and time probably had to do with the events of endgame, as hes now realized the development of the multiverse and its effects