Damage Red Tilt Doesn't Work on 1.21.4

Hello, First of all im using the Build 2109 of Model Engine and my minecraft client is vanilla 1.21.4, so is the server. Basically the red tilt damage effect on a modeled entity doesn't show the effect when i use the Model Engine RP, but if i take the RP off and just hit the entity the red damage tilt does appear.

If i use the RP for 1.21.2 it works fine.