Weird DVA glitch

I was watching a streamer play Overwatch. It happens around 10 or so seconds in. Sorry, I thought I clipped it in the right spot.

https://clips.twitch.tv/ResilientDeterminedMageOSfrog

The DVA goes in and out of the floor while being healed by an Ana, inside of a door frame.

The “I don’t want to click on your link” version:

On 2nd point Hanamura, before you go to the 2nd point, there is a room to the left of the mega health kit. Here, a soldier is almost on the steps of that room. There is a DVA(in mech) in the doorframe killing him. There is an Ana healing the DVA. Periodically the DVA goes into the floor and back up, almost like she is crouching but she is just in the floor.