Second bridged JTA transaction doesn't seem to commit if running on same server as first

See here for code to reproduce (follow steps in README.md): https://github.com/paulrobinson/quickstart-1/tree/master-JBTM-1324_Create_a_TXBridge_quickstart_that_bridges_to_two_services

Scenario:

• 1 JTA Client
• Invokes two WS-AT services in same JTA transaction
• Each service bridges to a JTA transaction which update a DB

The tests succeed if the client and service one are on the first server and the second service is on a second server. The problem occurs when the client, first and second service all run on the same server.