Bumping this as a heads up since the fix is now incoming.
For many months now towers on adventures have been missing their red intercept zones:
http://thesettlersonlinewiki.com/upl...dZone_None.JPG
They're due to return in the coming update on 27.01 so keep an eye out for them and be ready to retreat if needed:
http://thesettlersonlinewiki.com/upl...rs_RedZone.JPG
I've used SFtR because it was handy but as Vopicus mentioned this has been true of all towers on adventures, not just "Stealing From the Rich."