Missing health bar on final boss if reviveable before start

[superxpro12]

Issue Description:
If killed, and your revive spot is set to the final boss room, the heath bar doesnt show on the UI when the fight starts.

Steps to Reproduce:
Die nearest to the boss room, so the revive location is in the boss room
Get revived
Observe missing health bar

Mission Name (If Applicable):
I forget. The lights were out, he had a shotgun. Took an elevator to get there.

Platform:
Steam

Player ID:
superxpro12

Approx. Time of Issue & Timezone:
02/04/2023 1030p est

Reproduction Rate:
Sample size to small to compare. 1/1 sofar

Upload Supporting Evidence:

[Varyn]

occurs also on monstrosities for the revived players

[Luv_Fat_n_Sharks]

Also on newly joined to current session. Probably not updating boss health bar activation to people on spectator state. Bug for sure.