Happens all the time in Huttball.
In addition to that, sometimes you'll see someone on the catwalk, but they're actually below it.
So very bugged.
Almost a year ago one of the vents pushed me through the catwalk base and no one could target / attack me unless they had an AoE in my general area. I could attack, target, and kill other players though.
I got a "that is strange" response from CS