Gambit bug

Hi,
I encountered a bug in WoW and wanted to report it. On the last boss in Tazavesh: So’leah’s Gambit, during the phase where we have to destroy the stars, I couldn’t see the red arrow indicating that the mechanic was targeting me. Because of that, I had no way to handle the mechanic properly, and we failed to time the key.

Could you please look into this issue?

Thanks!