Withering Step's 'withering area' effect persists.

Bug report reference number:
2,272,359,021


Background:
On use, Withering Step creates a 'withering area' around the player and grants the player a buff and phasing. Any mob that enters the 'withering area' becomes withered (and turns greenish). This effect is supposed to be removed (along with the buff and phasing) when a skill is used or the buff is lost.


Bug description:
Withering step's 'withering area' effect sometimes becomes semi-permanent when another skill is used at the same time as Withering Step. The 'withering area' does not seem to expire nor get removed on using skills. The buff and phasing granted by Withering Step do not appear to be active during this bugged persistent withering state, just the 'withering area'.


Other possibly related bug reports:
Withering Step bug


Videos:
Triggering semi-reliably in hideout with Freezing Pulse (echo), Frostbite curse, and Cyclone: https://www.youtube.com/watch?v=Z8kcjirIJks
Triggering and showing effect on mobs: https://www.youtube.com/watch?v=FvOYmYScHXc


Obligatory screenshot:
https://i.imgur.com/Gotj32S.jpg

Here's another screenshot showing it working without the gem in the helm.

https://i.imgur.com/lQmCPZk.jpg