I’m wondering if maybe the UTS circuit breakers are the automatic resetting type, since they have this text in the Operation, Safety and Warranty PDF. It looks like you have to actually program the circuit Amps to be protected at setup.

Circuit Amp Rating
Warning: This setup option should be configured by a qualified electrician during the initial setup
and installation of the UTS.
Adhere to all national and local electrical codes when setting the Amp ratings for the UTS circuits.
Failure to comply with electrical codes could result in UTS malfunction and damage.
The factory default setting is 15 Amps. The Amps for each circuit on the UTS should
be set to match the Amp rating of the supporting circuit on the building circuit breaker.