Game Control Mode (Keyboard/Joypad/Mouse) : Keyboard
Where it happened (which map, which quest, which npc, etc) : Each charge of overheat skill takes much longer to regenerate than the whole skill itself (please see video)
Bump, just noticed this today as well. If you use a skill with multiple charges (without using up all the charges) the first charge will have twice the cooldown (and by “first”, I mean fist charge since the last charge you used up).
Did some testing with wizard energy bolt (9 sec cooldown, holds 3 charges) and here are the results:
Casting one energy bolt, regains one charge after 18 seconds.
Casting two energy bolts, first charge recharges in 18 seconds, second one in 9 seconds.
Casting three energy bolts, all three charges are returned after 9 seconds.
It’s also interesting to note that when using a controller the skills will visually recharge correctly (one charge regained every 9 seconds with energy bolt) but it is actually still recharging.
Either way, the “correct” way to use charge skills as it currently stands, is to burn all charges asap, or you’ll have a massive cooldown penalty on your skills.
EDIT
Okay, so this is interesting. I did some more testing and there appears to be a delay equal to the cooldown of the skill before the acctual cooldown of the skill starts counting down (this delay does not take extra cooldown from attributes into account by the way.
So say I cast energy bolt (9 sec cooldown) it will take 9 seconds before the game stars “cooling down” the skill. This "additiona"l cooldown is not reset when you expand multiple charges (the base cooldown however, is).
So I cast energy bolt. Visually it goes on cooldown, but there isa 9 second delay before it actually starts cooling down. During these 9 seonds, base cooldown will not be reset by recasting the skill. Recasting the skill after 9 or more seconds have passed will reset the cooldown of the current charge to 9 seconds. Expanding all charges will bypass the "delayed cooldown and the skill will recharge (with all three charges) after 9 seconds