DoT connection timeout



since I’ve recently started using Stubby with DNS over TLS, I was wondering if there was a server-side timeout on connections with the resolver (and if so, whether there is a way to increase it).
In fact, one of Stubby’s features is to keep the connection open in order to reduce the handshake overhead. However, when using, the connection gets closed after ~10 seconds of inactivity, no matter the settings or ipv4/6.
Thanks in advance