The ifconfig output from your first post shows 192.168.134.2 as the IP address of re0, and no IP for re1.
In your revised configuration, both re0 and re1 don't have an IP address. That could be a difference.
Re:
set block-policy return
Just try it, it won't make your firewall less secure.
From the pf.conf man page, the
block policy section
Code:
return This causes a TCP RST to be returned for TCP pack-
ets and an ICMP UNREACHABLE for other types of
packets.