Summons bugged when u enter instance zone

Hi,
I think everyone who's playing as a summoner had this kind of problem. Sometimes when u enter instance zone summons just dissapear or appers only one of them. I had this problem in zaken and kartia and not only me.
Something is decisively wrong because it happens quite often.

You're late:p been like this for long awhile..

Yes its been like this for a very long time.