mandatory-script-verify-flag-failed error when I enable -ecash flag

I was using bitcoincash abc node fine before.
I create transaction manually, sign, and send on the network.
But my signed transaction is not accepted from wallet with ecash enabled latest release.

Here are some things I considered, checked.

1) I turned on `-ecash` with latest release
2) changed amount unit to match. x1000000 for my input and output values.
3) checked that new `ecash` vout addresses are correctly converted to legacy address as before. I insert legacy vout address in transaction.

I get
`mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)`

Is XEC change some internal logic when I enable `ecash`?
Please advice.

No source file, test, or entry point is named. Reproduce the manually created, signed transaction with -ecash enabled on the latest release, compare it with the non-ecash case, and determine whether the mandatory-script-verify error is expected to be resolved.

Written by the indexing model from the issue text.