Unfortunately, I still haven't been able to recreate this, so I don't know how to fix it.
It sounds like Kris and Susie's maximum HP gets altered somehow, but I'm not seeing anything that would cause that.
Is what happened that you used Overheal, then later Hope, and immediately after Kris's attack ended on the turn you had used hope, they went down. Then you restarted, only to have healing items/spells no longer function?
Because that's the situation I've been trying to replicate and items/spells still heal for me.
I'll keep trying to find out what's causing it, but as of now I have no idea
Viewing post in VS susie (CH7 Normal Route) comments
sorry if not very descriptive, i only foudn out how to comment afterwards, but i think i used overheal to heal up, then used hope to stay at exactly 1 hp after getting hit, after the turn ended whenever i got hit it just went into the negatives causing me to never be able to fully heal up, and anything i tried to do wouldn't let me continue the fight without resetting, i have not been able to redo though, it might be a 1 time thing.