This might be a late response, but for anyone encountering this issue:
Try changing the curve compression settings from ACLAnimCurveCompresssionSettings to DefaultAnimCurveCompressionSettings. You can find this option in the Asset Details inside your animation sequence.
I ran into the same problem in UE 5.6 and checked the curve compression settings after noticing problems with bone compression earlier. For some reason, ACL compression seems to be broken for me, and it appears to be the default in newer versions.