[BUG] Nightfall talent does not reset Shadow Cleave CD if timed correctly

[AscalonTV]

1. Current Behavior

1.1. Description

When the Nightfall talent procs at the exact same time Shadow Cleave is used, the CD of Shadow Cleave will not be reset and Shadow Cleave will not benefit from the damage amplification of the Nightfall buff. Instead, the player has to wait for Shadow Cleave to be ready again before using up the Nightfall buff. Because this issue is very delicate on the timing it is especially hard to reproduce. However, in multi target scenarios with multiple Corruptions rolling, this has become a frequently observed issue.

1.2. How to Reproduce

       1. Make sure Nightfall is talented
       2. Apply Corruption on target (ideally multiple targets)
       3. Use Shadow Cleave at the same time as Corruption ticks and hope the tick procs Nightfall

1.3 Source Material

Video: https://www.youtube.com/watch?v=W4Rd8jP_T2I
Picture of Frame by Frame comparison: https://i.imgur.com/VtrUCau.png

2. Expected Behavior

2.1. Description

Expected behavior is for Shadow Cleave to have its CD immediately reset and/or its damage be amplified and the Nightfall buff be used up. When Shadow Cleave is not used at the exact same time as a Nightfall proc, it works flawlessly.