Visual glitch with enemies' life bars. (RN 3,223,989,421)

I ran a rare unidentified Ancient City map today, and flying bust monsters named "Living Memorial" (native to Act 5 Reliquary) didn't have their life bars appear at the top of the screen when hovering over them AND on top of the monsters when damaging them. They did take damage and die, however.

Screenshots of what it looked like:



The red circle is the area I moved the cursor around in. Life bars never even "blinked" at the top of the screen.



Same here, the circle is the area I hovered the cursor over. The irony here is that it's unknown who the life bar at the top belongs to - Living Memorials on the screenshot are dead (although there was another pack of them off-screen, directly at the bottom).

I went to A5 Reliquary afterwards, but the Living Memorials there had their life bars and names appear properly.