All events PWs are starting with low health. Any PW I’m choosing is starting with has either 10 or 12 health, I’m forced to heal them but when the match starts they still have 10 or 12 health (depending on the PW.) This is in all events. This is an old issue from many years ago.
I’ve noticed this as well, since the Dusk Until Dawn event is bugged for me. I can’t get past the SWW error screen, so I’m forced to cancel, resulting in a forfeit and losing most of my PW health. Playing another PW, even in story mode still results in low life. But restarting the app (Android) seems to correct the issue for other PWs that I haven’t tried to use.
It’s not a great solution, but allows me to switch PWs without having to waste heals on them.