For each of my jQm pages, there seems to be some blank space at the bottom of each page, and it\'s adding a scroll behavior for no reason. I\'ve attached a screenshot.
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Try dropping the viewport meta tag, it worked for me.
Yes, it's a jquery mobile issue. The style is set whenever the viewport size changes.
For some apps it is probably needed, but if it isn't helping you, just override it with an !important rule in your CSS to get rid of the side effects.