If possible include the following Byteman script in your run:
RULE Transaction.enlist
INTERFACE javax.transaction.Transaction
METHOD enlistResource
IF TRUE
DO traceStack("--------------------------->BM-Transaction.enlistResource: " + $1,100);
ENDRULE
RULE Transaction.delist
INTERFACE javax.transaction.Transaction
METHOD delistResource
IF TRUE
DO traceStack("--------------------------->BM-Transaction.delistResource: " + $1 + ", flag: " + $2,100);
ENDRULE
Thanks.