Am I reading this correct that if I apply a GPU on a LAS-SFO-BOS flight and the GPU clears on LAS-SFO but not SFO-BOS then it will be redeposited?

In most cases, the Global Premier Upgrade will be considered used if any segment of an itinerary is upgraded or flown. However, for travel which includes segments in United Polaris business class or United Polaris first class, the Global Premier Upgrade will be re-deposited if the United Polaris business class or United Polaris first class segment(s) could not be upgraded.

I don't see similar wording on the RPU. Anyone have experiences with this? I've had a GPU redeposit without issues clearing the domestic segment but not int'l.