Just had another encounter with a maple leaf lounge, this time in YYZ transborder. Agent denied entry and said to call visa as I wasn't showing up as a premium passenger in their system. Said to call visa, after calling they said everything is ok in their system and told me to call Aeroplan (ran out of time before my flight boarded, will call them when I get the chance). But it's definitely an interesting problem as I didn't even have priority boarding with my flight yesterday. Haven't seen this happen to anyone else and can't find anything about it online weirdly enough. I'll post another update after calling Aeroplan.