Sign with MPC derived key is not able to pass validation by btcd script engine

[wmh]

I used bitcoin-cli to send bitcoin to addresses (P2PKH, P2SH, P2WPKH) from an MPC-derived key and attempted to sign with an MPC-derived key. However, I consistently received a 'fail' message from the btcd txscript engine, with these error messages:

mandatory-script-verify-flag-failed (Script failed an OP_EQUALVERIFY operation)

mandatory-script-verify-flag-failed (Script evaluated without error but finished with a false/empty top stack element)

On the contrary, signing with the MPC root key works perfectly. Do you have any suggestions for troubleshooting this issue?