Tier 2 Yog altar is not showing fire in rift

Game mode: Singleplayer PC SP PVP version 103818 / 18696
Problem: Bug |
Region: USA

The second tier altar, Rift of Yog, is not showing the flames / fire in its “rift” you can hear the flames clearly but they don’t show up on the Rift.

Steps on how to reproduce issue:

  1. Build second tier Yog temple / altar
  2. stand by and see no flames
  3. They are there in Tier ONE and Tier THREE

I’ve never seen flames in a Tier2 Yog altar, have you?
I figured it’s supposed to look/designed like this. Just a charcoal pit.