[2021] Frostvault Dungeon Achievement - Three Sheets To The Wind

We've been trying this over the last few days and unable to complete it.

It doesnt seem to matter whether we do it in normal or vet but when we get the raging winds and kite across the banners they don't disappear or get destroyed. We thought maybe this was a visual issue so did the mechanic then killed the boss but still didnt get the acheivement.



Link to the video of the fight as well.
https://youtu.be/YlYBez52_b0


There was a change to this boss and the banners in the Deadlands update and could be that this is the cause.
This ties in with last completion dates from on ESO Armory as well although this isnt always the case.

https://www.eso-armory.com/achievements/2382/three-sheets-to-the-wind

Stats
Get Warlord Tzogvin to destroy all three of his banners with Raging Winds in Frostvault.
Link: |H0:achievement:2382:0:0|h|h
Achievement ID: 2382
Category ID: 24
Subcategory ID: 110
Icon: /esoui/art/icons/achievement_frostvault_flavor_boss_2b.dds
Completed on accounts: 120 (34.78%)
Completed on characters: 129 (5.39%)
Most recent completion: 2021-10-08 20:52:50
First recorded completion: 2019-02-25 16:56:25