AQ Sentinel and Psylocke

I was fighting a science sentinel in AQ map 3 with a 4* 4/40 Psylocke.
Each time that I triggered her Special 1 and reduced the sentinel power down a special attack bar threshold, it did not trigger Psylocke gaining a bar of power.
This has never happened before outside AQ anywhere in the game. Is this a bug or am I missing something??
Thanks
Each time that I triggered her Special 1 and reduced the sentinel power down a special attack bar threshold, it did not trigger Psylocke gaining a bar of power.
This has never happened before outside AQ anywhere in the game. Is this a bug or am I missing something??
Thanks
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Comments
Special 1: Telekinetic Blade – Psylocke manifests a telekinetic blade, using it in tandem with her Katana.
Depletes up to 25% of the Target’s Max Power.
If this attack causes your opponent’s Power to be reduced over a Special Attack bar threshold, Psylocke will Gain Power until she reaches 1 Bar of Power over 0.25 seconds.