Heroic Alysrazor NO RINGS ON THE GROUND in tornados ground phase

Did PTR Heroic Raid today, Didn’t see any rings for players assigned to fly in the air to refresh their buff like in this video from original cata
https://youtu.be/oC4_SG7U100?t=559

Confirm, no rings there. Well we saw one at the first pull but only one and that quickly disappeared and no more rings. while we did kill the boss - this is bug