Go through a process node twice?

My question is, if it is possible to go through a process node twice. Here is an example (I understand this could be designed better with a subprocess etc).

The process initially saves data from the form into the TravelRequest DB table. If there is a comment it saves it to the Comments DB table.

Later the Supervisor adds another comment through a user input task. 

Looking at the process details I can see it does not go through the gateway a second time.

Kind regards,

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