[dnsdist] increase in drops or changed semantics?

[Christoph]

Hello,

we observed an increase in 'Drops' as shown in the output of
showServers() on a dnsdist DoH server.
The drops count always used to be at 0 until a few weeks ago.
We use your master repo packages and update about weekly.
The amount of queries received and the backend resolvers did not change.

The amount of Drops  matches the amount of 502 as shown in the output of
showDOHResponseCodes().

Has the way how drops are counted changed recently?

thanks,
Christoph