Losing honour for no reason in Trial of the Sekhemas

Multiplayer, was swapping some gems mid combat to try to be able to attack from range

I have no idea what killed me here:
https://streamable.com/zhrnb4

I was already confused by this point as I thought I had lost honour for no reason that I could see multiple times before in this same trial run. Is damage to other players in the party transferred to everyone else in the party?

Was about to get third ascendancy point lol, bug couldn't have happened at a worse time