That's a lot more annoying than the infinite mana bug, that's for sure.

I'll try to reproduce it later and I'll post a dropbox link to the save if it pops up in the new version.

Sadly I couldn't replicate it today.

Before it was triggered with the Hero Verga (I forget spellings) with tireless march, other speed boosts... all ok so far... and then it was the Sovereign skill increasing moves that broke it last time.

(I say sadly because I would like to pin down that bug... but the unit/skills have changed so I can't easily get the same conditions to test it. I'll certainly keep a look out for other, new, negative-move bugs. I thought it was a /0 error at first, or due to -ve doomsday causing negative moves via the skill. Or some overflow with very high moves. But honestly I'm just guessing at possibilities now)

I wouldn't be too quick to dismiss it unless someone on the team can actually say they went and fixed it. Remember that the hero and build in question had 'flying' too, another thing to alter movement and terrain movement costs. If the root cause was never found it's likely that once the same conditions are met again the bug will re-appear.

Marking it down as fixed because things were swapped out and you can't reproduce it... well that's incorrect. A fix suggests the cause is known and has been corrected. Not that the cause is unknown but because you haven't seen it then it's 'fixed'.

Just thinking aloud for things to try (if you have dev cheat powers and really want to reproduce it).

It happened with a Flying unit + tireless march + sovereign abilities and + unit abilities that modify movement. Try to walk over different terrain (including fire/frozen). I can only try with a seagull, which obviously lacks unit abilities modifying movement.

Also try with 0 doomsday, +200 doomsday and -10 doomsday. (in the event that one quest is dropping the doomsday into negatives and messing up doomsday-linked movement). (also something I can't test as the only flying unit belongs to the wrong sovereign now, for the effect of doomsday on the bug).

I can't get it to happen again and starting with Peregan (to kit out a super, combat-seagull for fruitless testing) makes my skin feel itchy from all the bugs, exploits and imbalances and general oddness.