Increase in Failed Job alerts

We are seeing an increase in alerts for many monitor instances but one is firing more frequently than the others.

The message is:

The following errors occurred while monitoring database instance [************] between April 28 02:37 and April 28 02:47:


Friday - April 28, 2023 02:40:42

Monitor for database [************] failed in job [PlanPollJob] due to [I/O Error: Read timed out]. Will attempt to retry every [60] seconds...

I have searched the forum looking for help and found an old recommendation to look at contime.csv. Unfortunately, I'm not finding any help in there.

I'd be interested in pointers as to where else I can look or what might need to be done.