Either its shadow Meld or Kneel mechanic but players are porting or not showing where they are at when they come out of stealth. THIS IS NOT LATENCY LAG , it happened multiple times.
Can this issue please be addressed as soon as possible.
There's been an ArenaNet reply regarding this in the PvP forums: https://en-forum.guildwars2.com/discussion/comment/157118/#Comment_157118
It's an issue that has been around for a while in regards to Ports/Stealth, it's the Desync bug that was happening most notably with Downed players.
Before this wasn't an issue since there was no reason to stand still after Stealthing and Porting but since Anet made a Class around standing still to achieve damage, that has Stealths and Ports the bug is more prevalent and visible, and now it's forcing a fix for an issue that has been around for a while.