Posting from my lemmy.wtf account, since outgoing federation from lemmy.sdf.org appears to be broken at the moment:

Of course I don’t know for a fact that LFG actually checks subgroup 1 to figure out whether a squad’s map is full, but it seemed pretty plausible.

Also, I didn’t say that map full detection is in any way related to the squad size limit. The question is how does LFG determine whether a squad’s map is full? Does it actually check the map of the squad’s commander (squad might not have one) or does it check the map of the first player in subgroup 1 (which is what I think).