As mentioned in haproxy/haproxy#2992 I have started to see the following error message in haproxy's kubernetes-ingress for versions >= 3.2-dev12:

ERROR   haproxy/process/s6-overlay.go:66 [transactionID=9ef5718a-e6d0-44a7-872f-960f45cc1820] reload: unknown status:

This is most likely happening due to an empty response for an issued reload. It appears that reloading got a bit slower with the newer haproxy versions and client-native might not handle this correctly. The related code should be around here: