We are facing an issue with Ext.TabPanel scrollable vertically in sencha touch 2.

We are downloading a HTML page from server and those contents are shown in the tab panel page. We have set a scrollable:vertical inside the page.

The dynamic html has textarea field where user can enter data, this field grows when user enter more data in it. We have used autosize.js library of Jquery for autoexpanding the textarea.

While doing so, we are unable to scroll up and see the entire content inside the page.
But when i scroll down more of empty spaces seen at the bottom of the page.

I have also tried {translatable{translationMethod: 'scrollposition/cssposition/csstransform'}} which doesn't resolve my issue.

Can you please help us how to fix this issue.