Node Type Converters vs Derived Expression

Summary

I would like to confirm that node type converters are for data coming from a different view from the converter and derived expression are use when changes are made directly in the view.

We have a subscription setup from GL to Planning for accounts and for new requests everything works great but, when we make a change to the account description the description updates in planning but not the alias. So, I investigated and found out that we have a node convert for description but not Alias. We also have a derived expression setup for Alias to update whenever description is change. The description alias derived expression and node converter are set to concate the name "-" and description.