Regarding the 20% some clients/resolvers will mark a server as temporarily down if it fails to respond to multiple queries in a row. That way the user doesn't h

Regarding the 20% some clients/resolvers will mark a server as temporarily down if it fails to respond to multiple queries in a row. That way the user doesn't have to wait the timeout delay 500 times in a row on the next 500 queries. From the longer term graphs it looks like volume returned to normal https://imgur.com/a/8a1H8eL https://imgur.com/a/8a1H8eL