Was also getting poor performance, little jutters every few seconds. Verified the games file, made sure nothing in the dayz.profile looked different from stable version. No hard crash yet, just poor performance.

Some further more info, there is a prompt to open the door but this is very tedious to try get the right angle to make it appear. This Radar Dish building was on Chernarus experimental 1.22 so likely that both Chernarus and Livonia both have this issue, cheers :)