Honestly it happened when I start to play in PvP when the game was released.
Obviously in PvP is suicidal to be offline during raiding time, but my work lets me coming back home only when it was already started, so I experienced this problem.
I just spent an hour one time before being able to login… just to discover they raided me in the meanwhile
Than after 3 months like this I started to play PvE-Conflict, now they are 11 months I’m on the same server, found full only one time (I login 2-3 mins later) just because it was a free-to-play trial week end. I’ve spent thousands of hours joyful playing there
Honestly I think even in PvP it’s now difficult to have this problem (I suppose this because I’ve never seen complaints about that on the forum), sometimes it could happens the server where you play is experiencing some problems, the one where I play one day was down for 4 hours… My advice in that case is to play also a solo game, where you can experiement new things
Or just compulsively report the down state of the server like me