>>2791151I assume you're talking about the bachuba. Downloaded it to check, and yup, it was exactly what I said.
Move the selected bones—the actual weighed ones, parented to IK chains but processed before the IK chain states—below leg IKs or increment their deformation order, which might not be the best idea if it results in more calculations per second (I don't know how it's handled in any of the compatible environments).
You can optionally transfer weights (there is a plugin for that) from bones 377 and 410 (足先EX) to bones 125 and 129 (which have identical names) for higher correction freedom.
