Gossipsub not supported peers?

[AgeManning]

Description

There are quite a few peers on our network that don't support gossipsub and use up some of our peer slots. A quick sample looks like this on mainnet:

This seems like a bug to me, because it looks like we instantly drop peers of this nature: https://github.com/sigp/lighthouse/blob/unstable/beacon_node/lighthouse_network/src/service/mod.rs#L1342

[AgeManning]

I think this is going to be along the lines of a race condition.

Peers connect, initially not being supported, then disconnect, under a different scheme after being detected.