Qiyana NEW Feature (Mountain & Infernal Drake interaction)

https://reddit.com/link/1hycwx1/video/7ngbay2aw7ce1/player

There's now water element in the Mountain Drake pit and the Infernal Drake pit, this was NOT like this before.
This clip is from the new season 15, patch 25.S1.1.

They also fixed the bug where water would disappear from the drake pit (any drake) everytime the Baron appears.

NOTHING of this was written in the bugfixes list of the Patch Notes
What do you think? Spaghetti code bug or secret feature?