Guild Wars 2

The internal CD of 0.5s for hitting a target is applied even on other people’s skill.

If 2 revenants cast CoR in the same time only one of them will hit the target.

This is clearly a bug since it’s the only skill in the entire game working that way and it is absolutely against any collaboration purpose, needed in a MMORPG

This is clearly intended. A single person would never cast CoR within the 0.5 seconds CoR cannot be reapplied. Therefore a change that restricts being hit from CoR for 0.5 seconds after being hit by CoR ONLY affects groups hitting a player with CoR.

No. CoR could hit a target with 2 “explosions” if the target were moving.
A running target could be hit by the 2nd and 3rd “explosion” of CoR taking and incredibile amount of damage from a single skill. They may wanted to fix that

Same issue is being reported with Berserker’s Scorched Earth skill (Longbow F1). Having more than one burnzerker in the raid is now a huge liability.

The change is meant to prevent precisely that, someone moving and getting hit a 2nd time. The side effect is it blocking other people’s skill use at the same time.