ALPN disable h2

Is it possible to disable ALPN h2 for a single TCP router? I want to run a squid proxy behind Traefik, with Traefik doing SSL termination. I am currently trying to implement this through a TCP router with SSL termination, however it ends up negotiating h2 through ALPN with the client which then results in a bad request from squid. Forcing a connection via http1.1 works fine though.

Anyone have any ideas?