Parameters aren't getting updated by Data transform on flow connector.
The data transform is configured on flow connector to override the certain existing parameters but the updated parameter values available till data transform execution and after that we see the old values instead updated values .
there is no issue if use "Set Properties" instead data transform .
There is an article for reported behaviour and it was considered as Enhancement request for 7.1.7 .. Is still enhancement request for 7.3.1 as well .