Maybe I should've created a bugs topic, because I don't remember this tunnel being flooded on the previous version. Driving into water kills me. This is the tunnel that runs underneath the Painter knot.
I don't know why your landmine post has no reply button but the way to activate landmine detector is to hold space and mouse around, there are no landmines in anywhere other than warzone as far as I have seen.
Also, you should join the discord to get more recent updates and more timely updates on bug/game feature information as well as to get directly in touch with the dev.
