Since prepatch and on beta dc’s from moving and coliding with a surface or root effect DCíng have been very bad. It only seems to happen in combat, with disengage/vengeful retreat for example. I had it today when jump into a pool to get rooted on the last boss or ara’kara on retail.
I’m not sure where else to post this and was surprised I don’t see any other posts about it. It happens to my guildies and a few times to me too. Similar to how dragonriding and hitting a surface briefly could dc you regularly in Dragonflight.
Maybe this helps others find a place to post their findings, and otherwise see this as a cry for a fix.