User not prompted to save on exit from fluid payment request

We're currently updating to 9.2.35 and PT 8.57. Along with this update we're implementing fluid payment request. We're finding that if a user makes a change to a payment request and then clicks on Exit, the user isn't prompted to Save the payment request. When I went back into the payment request, the change wasn't retained.

Has anyone else experienced this? Is there something I'm missing in setup that would cause prompt for save on Exit from a fluid payment request?

Thank you,

Lisa