QlikSense Mobile behave strange on Mashup

[calvin_wee]

We have create a page with Collapsible bootstrap sidebar basing on this link: https://www.w3schools.com/howto/howto_js_collapse_sidebar.asp

We managed to get it working on desktop well but strangely not on Qlik Sense Mobile App. 

Click on open side bar button (phone viewing vertical), the side bar opens but the screen shrink to the left and leave 10% on the right blank including header. When viewing horizontal, it is ok.

Any idea and suggestion will be greatly appreciated.

Thanks in advance.

[calvin_wee]

Just to add on,

If we are accessing the mashup using direct HTML from Mobile, even vertically we do not observe the same behaviour.

But we encountered ErrorDialog, NoConnectionCreated but accessing hub or qmc using browser is ok.

Thanks and Regards