Form height problem

http://webix.com/snippet/11f29025
When the page is loaded, it works fine. But if i made some show and hide trick form height is changing also it effects main ui.
How to prevent this?

It’s worked fine when I changed scroll to true

I can confirm the issue.
The simple workaround - change order of commands and use “show” before “hide”

http://webix.com/snippet/7604985b

By default, form adjusts self to the inner content and when all elements with flexible height ( all textarea views) are hidden, form takes fixed size as well.

It is not the best behavior, so we will try to fix it in the next update.