Input_boolean ceased working, returns to last state after a few seconds

Configuration
1

I have a few (UI helper-created) input_booleans to set alarm options. I haven’t used these for a few days (they worked), but after one of the last upgrades (now running HA Core 2025.4.2) they ceased working.

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I can try to switch these using the UI, developer state setting, whatever, and they return to the state before after one or two seconds.

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The “old” (previous) state gets shown (I tried to switch this one OFF, and it returns to ON):

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But the log shows my attempt to switch it OFF:

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Even after above log entry and me trying to switch it, the Develeoper Tools → States shows “off”, and a much older “last changed” datetime:

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Is that a new bug? Could anyone please cross-check using HA 2025.4.2?

2

Hm. Seems it must have been a rather odd caching issue after the upgrade. I don’t remember seeing the usual “A new version of the frontend … RELOAD” message after the last upgrade, but hitting Ctrl+F5 a few times seemed to cure the above. (Using Firefox 137.0.1.)