I play the game since release, and i collected some bugs, weird phenomenons.
I don't know if someone already mentined some of these problems (if they did, ignore my "discoveries"):
-Archers can't shoot from buildings/bunkers if they are higher than the target.
-MADMAN still didn't attack me (pretty easy win against a haihead base, especially if 'mental AI' is enabled... just place some shelter, inferno, spinblade, lightning rod, etc in the base
)
-In 'infantry only' on elusive peace if the enemy captures the tech airfield, they can build aircraft, and defenses around it, (problably it can occur on every map where is a tech airfield). And in some random(?) cases, they can build defenses around other tech structures too.
-In the 'stone ocean' and 'world rejector' maps the enemy forces get stuck, and it reeeeeeeeeally slows down my (not the best, but fairly good) PC.
-On the 'omega city' map, the enemy can build defenses waay far from its base - not the same as above, because they are in different places, no tech structures in the near.
-If the mental AI is enabled, sometimes the chinese can build 4 centurions, even if they have one left (they build 2 or 3 first, and I kill most of them, after that they can build another 3-4). It happend on the 'omega city' map a couple of times.
-Sometimes the engineers got stuck in tech buildings, and i have to force attack the oil derricks, if the 'immune oil derricks' is enabled to to win.
-If a colossus is deployed, sometimes it moves around and shoots my airborne units at the same time :( .
-On the 'twin bridge' map if there is a PF enemy, their kappas hover at the edges of the map, and i don't kow why they went there.
I think that's all of it!