This happened like 20 minutes ago, hit the hades and not only did it not trigger, but I got stuck like this for the next 2-3 minutes. I tried to find where to submit a bug report but the only thing I was able to do was find a survey to take and use as a proxy bug report.
Report is as follows;
Mordred's ultimate (Reproducibility unknown)
when hitting an enemy god through a wall, if an enemy is right up against it, will fail to hit and then trap mordred in it.
Steps to reproduce.
1) position enemy god against a wall
2) as mordred ult through the wall
3) as your ultimate is about to end try and hit the enemy god directly from the wall
Environment Details
1) This was in the solo lane against a Hades
2) This was Chaos side's horn wall
3) Mordred level 10, Hades level 7
4) The Match ID is 808b421c-aa8a-4e55-bf43-63805142ed6d
5) Time of bug was around 9:30-11:30~ (exact times unknown, the video I have starts at 10:22, but it had been atleast 1 minute before, and I wasn't paying attention to when it resolved.
Extra Notes
The bug "resolved" itself by kicking me to the main menu, though I was still connected to that matches voice chat, and when I'd returned the enemy Hades was completely invisible to me for the rest of the match. I'm not sure if it's part of the same bug, or a separate one entirely.