1. Some monsters frequently get stuck.

Minotaurs end up bashing the edge of the screen, forever.
Rollers hit the edge of the screen and spin forever. (Observed in "Regypt" map, in one of later rooms where there are stairs descending from camera position to the pit in the upper right)

2. Rollers sometimes magically roll upwards instead of hitting obstacles. They suddenly appear much higher than they should. Again, one case was observed in the "Regypt" map, on the screen with "Excavate here" sign (very late room). Try to get rollers to excavate, then make them stuck underground. Provoke them to hit walls in various directions. In my case one suddenly appeared on top of the floor it was bashing at from below. It wasn't even visible prior to that.

I've noticed the exact same bugs.
The Minotaur bashing is pretty annoying.

And this is why you don't hire monsters to help you on your archaeological digs. Invest in some good, solid TNT instead. (Use bombs wisely!)

Also, the map is called Aegypt, although Regypt sounds pretty cool too.

Fiberglass Screen
Welded Wire Fencing Panels
Galvanized Welded Wire Mesh Panel

I had the Minotaur glitch in the Level I made, but when I provoked him he started chasing me.

About the strange roller/armadillo movement - it's easy to observe in the level #3294 (Speed 0.0.5). It starts with an armadillo in a cage.

Go to the corner to increase the chance that the armadillo behaves peacefully. With a little luck, it won't attack, it will walk around. If it does, it will magically warp outside the cage and stand on its roof.
And yes, the bug persists in 0.1.6 .