When consuming the Missile Barrage proc for Arcane Missiles (reduces channel time, increases fire rate and damage), the benefit does not actually work while under melee attack. Missiles fire at the normal rate (rather than increased speed) with a total of 3 missiles fired over the entire channel, while it should fire a total of five.
Tested while questing on melee mobs in Netherstorm.
Please note that I have fully specced into Arcane Stability, meaning that pushback from melee attacks is irrelevant as I should be receiving no spell pushback for Arcane Missiles.
edit: this also seems to be the case while actively being hit by ranged spells as well.
5/5 Arcane Stability
Reduces the pushback suffered from damaging attacks while casting Arcane Missiles and Arcane Blast by 100%.
5/5 Missile Barrage
Gives your Arcane Blast a 40% chance, and your Arcane Barrage, Fireball, Frostbolt, and Frostfire Bolt spells a 20% chance to reduce the channeled duration of the next Arcane Missiles spell by 2.5 secs, reduce the mana cost by 100%, and missiles will fire every .5 secs.
9 Likes
Can confirm happened on Atiesh today 9/1/22 in Black Morass.
4 Likes
Its still bugged, please fix 
4 Likes
This is still occurring on Beta and Live. Launch is 4 days away. Fix this please. If all of your other assignments were completed, then all the hours you’ve put into making something exactly like dungeon finder but not dungeon finder would be justified, but you have had bug reports for this and other problems going back 2 months and you’ve done nothing on them while continuing to sink man hours into a White Elephant Group Finder.
3 Likes
Thank you Blizzard. This latest build on Beta & PTR fixed this bug and the annoying Dalaran Cooking Dailies! Much Love! Now go make the replacement dungeon finder better to your heart’s content. 
1 Like
Still seems to be bugged on live
4 Likes
It’s like it’s not benefitting from Arcane Stability, maybe being treated as a separate spell that is missing the flag.
4 Likes
yeah, they broke it again with those last two updates before launch
4 Likes
Yes can confirm still broken, please fix blizzard.
3 Likes
Confirmed.
It’s still bugged today. And it’s rather annoying
3 Likes
i was about to open a ticket for this, but it seems like someone else did. I can confirm it’s bugged. Please note it’s not under melee, only condition that has meet is if the objetive is near.
1 Like
I also just ran into this problem when I started leveling a mage today.
1 Like
Confirmed, this problem is still occurring. I believe Lanolinstarr has it right: the Missile Barrage version of Arcane Missiles is technically a different spell and is not covered by Arcane Stability. Using an addon that shows spell pushback proves this: I am losing channel time when I take damage. It does NOT happen if you have Mana Shield active.
1 Like
How has this still not been fixed, without any acknowledgement from Blizzard staff?