Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/DevDunkStudio/AnimatorLOD/Demo/Scenes/StressTest.unity” Scene
3. Enter the Play Mode
4. Observe the characters in Scene view

Expected result: All characters continue to perform running animation
Actual result: Some characters go into the default pose

Reproducible with: 6000.0.51f1, 6000.1.7f1, 6000.2.0b5
Could not test with: 2022.3.62f1 (Assets\Samples\Animancer\8.0.2\Animancer Samples\07 Sprites\02 Directional Character\DirectionalCharacter.cs(131,24): error CS1061: 'Rigidbody2D' does not contain a definition for 'linearVelocity' and no accessible extension method 'linearVelocity' accepting a first argument of type 'Rigidbody2D')

Reproducible on:
Play Mode
Windows Standalone Player

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested