I see this is still in issue at version 1.12. And this one had been shown off to the public now, by AntVenom. I had reported this before, but i found this is a duplicate bug that i doesn't know before.
Thanks to getting me know that! I hope MC-89361, the bug you telled me about, is resolved!
I hope it would be fixed...
Please note that you can't set HeightScale to that high if you that manually without going to Presets. Instead you had to do it by going into the Presets.
If this bug ends in Won't Fix then darn it