md-input-container with initially hidden <textarea> is permanently set to height = 0

[jelbourn]

http://jsbin.com/kabozo/2/edit?html,output

When the setupTextarea() function in input.js runs on a <textarea> that is hidden, the height calculation results in zero and is not run again until some text is entered into the input.

[mckenzielong]

would it be good enough to just add check for height at the end of growTextarea?

if (height > 0) 
   node.style.height = height + 'px';

http://plnkr.co/edit/xjZxyBPUi0jp54uclHdX?p=preview

[wuv1982]

i have the same problem.
but the reason i think is that i used $mdModal , it may directive the <textarea> before it shows.
so both of the offsetHeight and scrollHeight are 0.

[WhiteAbeLincoln]

I am also getting this problem. It occurs when the textarea is on an md-tab. The textarea size is fixed once text is entered.