I see those messages pop up for me once in a while and cannot understand where they're coming from.
They show up in Stackdriver (which observes console output in GCP containers), as well as Sentry which works similarly.

As far as I can tell from the code, this shouldn't be happening at all. Is there any way to turn off those log messages?
They eat into our log budget unfortunately.

I wish I had more info to give you, but the only thing I can see in my logs is the message in the title.
There's nothing else being logged as far as I can tell. Not before and not after.