Today I found another bug in Soldat 1.4.2, I never heard of it, so I don't think that it already was reported.
1. Start a new game with no bots
2. Stand on the ground
3. Press the right mousebutton to activate your jetpack
4. Press ESC to open the menu while holding the right mousebutton
You'll see that your jet amount is still decreasing, but the game is paused. If you close the menu by pressing ESC again, your character will instantly jump in the air to that point where it should be if the game woudn't be paused... looks funny