FBX Blendshapes - Strange Behavior

[slumberface]

For some reason, when I export a model with blendshapes as an FBX, the value of the key is being set every Update() to the value it’s exported at.

For example, a blendshape exported with it’s key at 0 is being told every update frame to be set to 0, and the only way to adjust at runtime seems to be telling the key a different value during LateUpdate. This behavior does not occur in .blend files.

All unity import settings seem to be identical between the .blend file and the fbx, and I can’t see any settings in the FBX export that seem relevant.

Any ideas?
Thank you,

[slumberface]

I’ve been able to observe that it appears the blendshapes are being overridden by the animation somehow?

[slumberface]

I found that disabling this option allowed the blend keys to have no attachment to the animation, but unchecking it also causes the rest of the models animations to behave erratically for reasons I can’t quite pin down.