App still launching on computer start with option turned off


I’ve seen some people complaining about this issue on topics dating from january to march 2020, but not after.
Someone from blizzard told them that a new update should have solved the problem and that they needed to do a clean install, but I installed for the first time on a new computer yesterday and I have this issue (I’m on a MacBook Air and it’s V2.3.1.13029).
I’m sure I specifically refused to let the app start on launch, and it does not appear in on the list of apps that start on launch in mac system preferences so I can’t do anything about it.
It’s really annoying. Does anyone knows how to deal with this ?

Thank you very much