I was able to see the Siege roller getting stuck, but it doesn't quite fit your description. Can you please provide a screenshot of the exact spot where your Siege Roller got stuck? Thank you for the report.

Heres a screen shot from my game i just had right now

http://images.akamai.steamusercontent.com/ugc/172665090137494743/9B32E7DE099650956945CADC26F7CA0B2982BF16/

Chaos 3.. if we didnt have ghostly halbards this would have been most upsetting....

exactly the same happend to me on PC same spawn and everything but my roller teleported back into the spawn after being out on the lane

Additional information..

Ogres can get stuck on the same spot ;)

http://imgur.com/a/gbsds

I second this.

https://gyazo.com/363925bcf035ba2a4aa8a8848b632897

https://gyazo.com/5109e4111d3c90e5e5da020444eb1c98

Hope it helps

same problem and this is the second time it happen. It happen yesterday for me as well. Same spot same map.

2 Times today & 1 yesterday, in the dead road map, chaos 3 too, in a public session, spent 10-15 mins to kill it with some good guys on the 4th wave. (good thing it had only like 7.5 million HP.

sadly, 1 blue orc passed the wall and destroyed the crystal on the 5th wave and 15 mins of killing a stuck roller is wasted T_T

I can confirm that this is still occurring as of 3/14.

The Siege Roller got stuck on Wave 3/5 of Chaos 3 Trials on Dead Road, attempting to leave spawn on the east-northeast lane, the one with the hairpin turn beneath the acid fruit tree trap.