Do you have proxy-arp enabled on your "bridge" interface?
Hint: google "mikrotik sstp vpn proxy-arp"
And please have a look at viewtopic.php?t=114422
and search for "proxy-arp" string on that page.
BTW, your ether2 is member of "bridge" bridge.
/interface bridge port
add bridge=bridge comment=defconf interface=ether2
So it is better to refer to bridge instead of ether2 in your config, so please consider replacing
add address=192.168.1.1/24 comment=defconf interface=ether2 network=192.168.1.0
add address=192.168.1.1/24 comment=defconf interface=bridge network=192.168.1.0