try out this:
iptables -t nat -nvL

What to do, if Squid box is crash? In my sample we are go directly automated It's more important for me and really Transparent.

This is working good for me: Mikrotik config (Sample) / ip firewall address-list add list=transp-proxy address=10.0.0.0/24 comment="Transparent proxy users" \ disabled=no add list=squid-always-direct address= 69.17.117.207/32 comment="speedtest.net \ always direct!" disabled=no /...