Runic Corruption: Should extend duration of existing aura instead of refreshing it

[blu3bird]

Describe the bug
In the game, if a runic corruption proc happens while you have an existing runic corruption aura the duration of that aura is extended by 3 seconds.
In the sim, the existing aura is replaced (refreshed) with a new aura that lasts 3 seconds.

To Reproduce

1. run a custom rotation that maximizes runic corruption procs while runic corruption is active (see link below)
2. check log for "runic corruption"
3. you should see "aura refreshed", like this:
   00:20:900 [Player 1] Aura gained: Runic Corruption.
   00:21:900 [Player 1] Aura refreshed: Runic Corruption.
   00:23:900 [Player 1] Aura refreshed: Runic Corruption.
   00:26:900 [Player 1] Aura faded: Runic Corruption.

Expected behavior
There should be no "aura refeshed" events.
Instead the duration of the existing runic corruption aura should be extended by 3 seconds per proc.
Meaning the example above should look like this:
00:20:900 [Player 1] Aura gained: Runic Corruption.
00:29:900 [Player 1] Aura faded: Runic Corruption.

Sim Links and Screenshots
custom rotation that maximizes runic corruption procs

WCL log that shows there is no refresh event in-game
(and the duration is always a multiple of 3)