This is not a bug, if you had searched the forum you would have seen that the engine is limited to 2 Billion C-Bills, then it will go into the negative.
I found the problem the in cheat discription on how to make it work is wrong. the read me in the forums/FAQ is the right way. atleast in wording.
[Edited by Cutterwolf, 7/14/2018 6:20:11 PM]
That is a known issue when you use ie unlimited movement or other options where the game gets set into heavy calculation of values. It doesn't happen for all but we had a couple of posts about it here.
Yeah, it takes awhile for the engine to calculate where it wants to go when you increase the possible moves by an exponential amount. It's not as bad in some maps, but others it's crazy. I find that turning it on when it's my turn generally works pretty well, then I turn it off when the bulk of the enemy turns come up or when I get all my mechs where I want them.
This would be resolved by making it only affect player/ally units. But, not sure if that's as easy as it sounds.
[Edited by Bacon Overlord, 8/28/2018 6:41:01 AM]