Load Balancers dropping requests with a fixed pattern

We have few load balancers in TOR, they all drop requests during specific time periods, hourly, which are at

:27, :32, :33, :34, :43, :55 every hour

We ran curl command every second to see the pattern, and it was confirmed. curl directly to IP of load balancers still experiences the request drops.

time_namelookup, time_connect, time_appconnect, time_starttransfer, time_total 0.001709 0.016332 0.083841 0.000000 10.002891

All laod balancers drop requests, time_starttransfer is 0 and time_total is the timeout of the curl, this happens at the specific times, every hour.

We already created a ticket with DO, but wanted to check and see if anyone else experience such issues with DO load balancers.