There is a trouble in Narayana integration that if commit of the transaction fails it could happen that XAResource is not ready (e.g. recovery helper is not yet loaded), it's needed to reactivate transaction once again when the commit is called next time. Right now there is thrown XA_RETRY and the transaction is left in the knownTransaction map and served directly next time.

Point here is on XA_RETRY delete the WFTC local cache from the txn and reactivate txn for next time commit is called.