Changing power profile sometimes immediately resets it back to the original value

For example:

nate@Liberator:~/kde/src/plasma-workspace$  (master) powerprofilesctl 
  performance:
    Driver:     platform_profile
    Degraded:   no

* balanced:
    Driver:     platform_profile

  power-saver:
    Driver:     platform_profile

nate@Liberator:~/kde/src/plasma-workspace$  (master) powerprofilesctl set performance

nate@Liberator:~/kde/src/plasma-workspace$  (master) powerprofilesctl 
  performance:
    Driver:     platform_profile
    Degraded:   no

* balanced:
    Driver:     platform_profile

  power-saver:
    Driver:     platform_profile

If I use our UI in KDE Plasma, what happens is that it sets itself to the new value, but then immediately jumps back to the old one:

DBus traffic confirms this. Here's a Bustle log:

2022-09-07_11_21_46.pcap

Unfortunately this is not 100% reproducible for me, and I have not been able to discover a pattern to it.