Not a bug. Technically you got attacked twice, but you only got healed once, so you died. As for getting reaped and attacked the same night... it happens, but you die that night. I hope this helps!

AFAIK heal stopps ALL healable attacks, so "healed once, but attacked twice" should NOT be an issue. Ever. If , for example, you heal a target that gets attacked by assa and alch on the same night you get "healed" feedback on your target twice and it lives. Or at least that's how it was last time I checked.

Being reaped is not healable, and this is where "could not heal" is normally from (it did come from a real healer right?).

The real question is why you fell D1 and why assa's hit was listed as a cause of death.
Unless the healer was fake I'd call this a bug.

What IMHO should have happened is healer getting "healed" and then "unable to heal" on the same night. And you should have fell as all reaped targets.

This is actually somewhat important btw, becasue reaped targets affect vote counts. It isn't going to mean anything in early game, but on later nights this can cost reaper the game.