[BUG] Rupture does not tick for the full duration when refreshed in Subtlety specialization

[corymonroe]

1. Current Behavior

1.1. Description

Rupture sometimes does not tick for the full duration when refreshed in Subtlety specialization. I am not certain, but I think it may fall off early when it is refreshed either in shadow dance or while expose weakness debuff is present on the target.

1.2. How to Reproduce

       1. Get a 5 cp rupture up on a target dummy
       2. use shadow dance
       3. use ambush to 5 cp
       4. use eviscerate to refresh the rupture
       5. let the rupture fall off
       6. when I perform the above steps a high percentage of ruptures disappear before the last 1 or 2 ticks

1.3 Source Material

https://github.com/JamminL/cata-classic-bugs/assets/3914260/a3df7ec4-e36c-4cf3-b2a0-d7bb96352ebb

2. Expected Behavior

2.1. Description

Rupture should tick for the entire duration. Note, in other rogue specializations I am unable to get a rupture to fall off early.

2.2 Source Material

N/A

[corymonroe]

Edited to make a bit more clear that it doesn't not tick for the entire duration of the spell and added a video

[Korbrawr]

I've noticed that feral druids have a similar issue with their glyph of bloodletting, which extends rip by 2 seconds (to a max of 6 seconds) when using shred or mangle in cat form. In some circumstances, rip will fall off before its final tick.

How to reproduce

       1. Cast rip on a target dummy
       2. Immediately shred once
       3. Wait until rip has less than 1 second remaining
       4. Shred twice
       5. Rip will fall off at 1 second remaining exactly, skipping the final tick

https://github.com/JamminL/cata-classic-bugs/assets/104960823/c0030a99-27a1-4511-88f1-0c60ddfb7ea1

Log: https://classic.warcraftlogs.com/reports/6aNnjJg3FWRZYrBh#fight=last&pins=2%24Off%24%23244F4B%24expression%24ability.name%3D%22Rip%22%20or%20ability.name%3D%22Shred%22&view=events

[SimonBpvp]

I believe that every talent/spell that refreshes dots is currently bugged in some way. Something tells me it’s related to haste or a more powerful spell is already active mechanic, but that’s guessing. Or it could be related to the Cata mechanic which protects dot ticks from being munched when the player re-applies the dot.