[exim] smtp_accept_max_per_host and sender_host_name

When I try to use $sender_host_name, the first lookup works. All subsequent
lookups return the the same as the first one. I'm guessing the name isn't
cleared in the main process.

Would this be a correct assumption?

I looked at daemon.c handle_smtp_call() at the end. It clears the address
but not name.

Please don't discuss the reasons this shouldn't be done. I'm only
interested in the fact that sender_host_name is not changed after the first
lookup.

Exim version: 4.95-RC2 debian but custom compiled and using custom exim.conf