CommitInSeparateDatabaseTransaction fails for autocommitted object

[WazzaaaaA2]

When trying to commit an object that was previously autocommited, the java action throws an error. This is unexpected, please document in the JA or fix the issue.

Object of type 'MyFirstModule.HttpMessage' with guid '8444249309133364' cannot be updated, as it does not exist anymore

Committing an object the normal way before the executing the JA does not result in an error, but neither in a comitted object.