I noticed something in my first 4.0 FI game that looks like a bug. It might have been present pre 4.0 but I haven't come across it. The jist of it is that a diagonal street (here "paved 2") with modular buildings in direct contact with it on both sides, will either 1) cause tank movement orders to be cancelled or 2) the tank will re-rout its path if possible.
Note that no "no go" icon is revealed and waypoints are plotted as usual. Preliminary tests show that it is enough with a couple of m