was recording 1v1 battle against diamond shell push build
at some moment I walked 3 tiles towards my opponent, getting into range of 4 and thus allowing to attack with my Heat Orb Cannon... at least thats what I planned to do
as you can see, Heat Orb Cannon button is disabled and has "out of range" icon. Obviously this is a bug, since we all know Heat Orb Cannon has range of 3-6; I even had my cursor held over this weapon and its range can be seen on the screen, with my opponent clearly being inside that range. Still, I just couldn't press the button and fire weapon; I had to cool down instead this turn.
It should be noted this is not first time I encountered this bug; some time ago, I couldn't fire Heat Orb Cannon after walking from range 2 to range 3 (sadly I made no screenshot that time). I also don't know what causes this bug, as most of the time "walk, then fire Heat Orb Cannon" works perfectly.
I recorded entire battle on the video. It also demonstrates how Burning Tractors are walking (like legs) and not riding (like tank tractors)