Digital Ocean Load Balancers - Sporadic 503 errors with "Backend Keepalive" enabled during Kubernetes pod deployments

There seems to be some sort of issue with the “Backend keepalive” setting on the DO load balancers.

Whenever I deploy new versions of pods to my cluster, there are a few seconds when 503 errors are returned for most web request. This does not happen when “Backend keepalive” is disabled. These 503 errors only appear for a second or two. And it happens whether or not my backend server has its keepalive functionality.

Has anyone seen something like this?

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