Yesterday I started playing Red Orchestra. Joined some server. The Map was Konigsplatz. After about 5 minutes blue dots randomly started to come up all over the map. They were only on the ground. After another 2-3 this giant thing resembling an anti tank hedgehog comes up in the middle of the map. I quit the map thinking something is wrong with the server. I join another. The Maps Kaukasus. As soon as I join these yellow lines appear all over the map. What could be wrong? I didn't change my settings at all or anything.