While I've been playing (on PS4), my character stuck near the corner of the wall on "The Shard" map near the defenders' spawn. This happened twice in that match. Luckily, a character gets stuck only while he's running forward. So this issue is workarounded easily by running in an other direction. Here's the video of the issue.
P.S.: I didn't put the "PS4" tag because I thought that this issue is not platform-specific but is map-specific.