Sunspot is currently bugged against red hulk. Sunspot should be regaining his solar charges as red hulk shrugs them off, but his solar charges are just going down. This video is against the red hulk boss in book 2 act 1 chapter 1 quest 3. I’ve fought this matchup many times before and sunspot has always recovered his solar charges until this time.

https://youtu.be/WkcZ85iv1AQ