SSIS Sequence Container TransactionOption

I have an SSIS Package with two Sequence Containers.

Sequence Container 1 has the TransactionOption Property set to "Required" and Sequence Container 1 (which is chained off Sequence Container 1) has the TransactionOption Property set to "Supported".

If something fails in Sequence Container 1 the transaction is rolled back.

If something fails in Sequence Container 2 the transaction is NOT rolled back???

All tasks inside both containers also have Transaction Option set to  "Supported".

I then tried to put all tasks inside one container and it works.

I have no idea what is wrong here????

CG