Pages 502 err

Hi everyone, I have a question about Pages.

The Pages system is normal at first, but after a period of time, a 502 error will appear.

I checked the ci records, they were all synchronized normally, and there was no error. However, after the 502 error occurs, Pages cannot be restored unless the entire gitlab system is restarted.

If you need a running log, please tell me where to get it.