[RSS Feed/News] Mobile view not loading full screen on launch

[XenForo]

Mobile view not loading full screen on launch. What needs to be tweaked here. When I scroll to all the way to bottom of forum or click on a thread , the forum then adjust the width to full width, loads fine then after. It may be some setting in my forum , but not sure where to adjust ... Pls help , thank you

The view in laptop loads fine. only mobile loading issue first time forum load only.

I attached two screenshot named appropriately below.
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