High CoreBlaze moving randomly

Description of the bug: (optional screenshot/video): No video as I do not record myself in every boss runs, screenshots just look stupid as it is just a character dying on the left side.
What is supposed to happen?: CoreBlaze should not move and deal body touch damage to everyone.
Where did you find and/or notice this bug?: In the CoreBlaze boss map.
A step-by-step guide to re-producing this bug (optional): When a character enters the coreblaze map, coreblaze will have a chance to fly from the right to the left and back to the right and dealing damage to everyone. My character died twice for no reason because it could not tank a coreblaze body flying touch.
Extra information (optional): This happen twice already, killing my washing character and losing 2 safety charm for no reasons. One of them we ran out of ress and I loses exp for no reason. Unwashed/unfinished washing character should not be punished for no reasons due to this.

 

Thank you for the footage. Mine was slightly different even though this happened once too.
The one in my opening report post sometimes happening to zakum after you kill a body: the new spawn body moves left and either back to its original position (the one I mentioned above), or not move back (like your video footage). Difference is a new body spawn (for zak) vs new character entering the map (CoreBlaze), from my experiences.