I have a UDT template that I drag onto a separate view. The tag I bind it to is a leased tag that is not polled unless leased. When I first open the view the tag updates, but then it will not continue to update while staying on the screen.
Are you seeing any errors or red overlays or the tag just doesn't update? What kind of device is this? Some AB ControlLogix devices are known to have trouble with leased tag groups. I'd also check the Status> Device> Details page on your gateway for that device and see if the device is being overloaded.
So I created a support ticket and we came to the conclusion that it was a bug in ignition. It is corrected in version 8.1.22.