I gave a zombie frost walker boots. It only generates ice when it stands a block higher than it is supposed to. I wish you luck on fixing this.
MCPE-81862
Frost walker boots don't work correctly on mobs
Resolved
Duplicate
0
Thank you for your report! I've tested this and can confirm the behavior. This is how frost walker works on armor stands as well. Since, we're already tracking that issue at MCPE-41398, I will have this ticket resolved a duplicate.