Something is wrong with mage mana regeneration

[Faxxy]

xFun realm

Mana regeneration has basically been cut in half for no apparent reason, even with full haste gems to make full use of https://www.wowhead.com/mop-classic/spell=117957/nether-attunement

8/10 Importance

Our damage as arcane mage directly relies on the % of mana remaining from https://www.wowhead.com/mop-classic/spell=76547/mastery-mana-adept , and it's important for all spec to use spellsteal. Now we run out of mana continuously. 

Proof below of regen rate and comparison of before and after whatever has happened. I have more haste now and half of the regeneration rate?

Even in retail videos from 5.4+ you can see the regen is higher for extra proof and that's without full haste too 

Pls fix

Edited yesterday at 03:51 PM by Faxxy

[Macsimka]

Fixed. Will be applied after update.