Inheritance bug when setting remote server port

Have a secondary zone with a primary that fails the transfer over TLS but should work over plain DNS:

zone "dot-fallback" {
       type secondary;
       file "dot-fallback.db";
       primaries {
               10.53.0.1 tls ephemeral;
               10.53.0.1;
       };

This should work, but doesn't currently because the second primary (10.53.0.1) uses the TLS port instead of the default DNS port.