Bug Spotlight culling broken?

Edit: Now resolved. Not a bug. The problem light had been copy+pasted from a real scene into the test scene. Creating a new light and manually setting it up didn't exhibit the same problem.

After enabling the debug inspector to try and track down the difference, I found the 'Use bounding sphere override', which had somehow been enabled for the problem light, causing the problem.

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Is anyone else having problems with spotlights disappearing when close to/looking away from the light?

URP 12.1.6, Unity 2021.3.2f1

It's not a 'too many lights' issue - test scene just has directional and one spotlight.

(It was initially seen it in a much more complex scene, where switching between forward and deferred lighting didn't seem to affect it)