This bug has been reported multiple times, but thanks to many clues on the forum, here’s a reproducible scenario and a video.
This bug consists of 2 parts. Part 1:
If you have a specific skill A in slot 7 underwater and slot it into slot 8 on terrain, that skill A will jump from slot 7 to slot 8 underwater as well, swapping places with skill B which was slotted in slot 8 before it. Works both ways, for terrain-water and water-terrain.
Part 2:
When you have skill A in underwater slot 7, and then cast skill B which is in terrain slot 7, and then slot skill A into terrain slot 8, the slot 8 will go onto the same cooldown as terrain slot 7. When you go underwater, you will see that it happened due to the part 1 of the bug, as skill A which was on cooldown underwater jumped from underwater slot 7 to underwater slot 8, and then triggered back a cooldown on the respective terrain slot.
All skills should stay in their respective places both underwater and on terrain, even if they’re the same skill.
If skill A is on cooldown in slot 7 on terrain, but is slotted underwater as 8, then slot 8 should be on cooldown underwater. Or it shouldn’t and slot 7 should, based on developers view of skill-slot concept, but under no circumstances should 2 slots go on cooldown.
I really hope this gets fixed in the feature patch. I like having my skills where they belong and not jumping around or going on dual cooldowns.
Quite honestly given the number of times this has needed to be explained to players on the bug forum, I am a bit shocked that Anet seems to not know how their own game mechanics work.
As I recall this actually wasn’t a problem at launch, the shared land/underwater cooldown was added to the game sometime after release.
I recommend just leaving your 3 most useless utilties equipped underwater. Since there’s hardly any underwater combat in this game you’ll probably not even notice.
Quite honestly given the number of times this has needed to be explained to players on the bug forum, I am a bit shocked that Anet seems to not know how their own game mechanics work.
It depends on the time you spend on the bug forum IMO:) With a bug like this, it’s not that simple to even find a relevant topic – those’re called “portal cooldown bug”, “banner cooldown bug”, “thief signet recharge bug” etc.
This bug has been mentioned on reddit today again and it appears that many players still do not know why this is happening. There are some suggestions on how it should work from player’s perspective, too.