Buggy Tabs on iPhone 6

Has anyone encountered buggy behavior with tabs when trying their app on iPhone 6 (iOS 9.1).

My app was experiencing a variety of glitches with tabs. When I tapped on a tab, its graphic would briefly jump down, then jump back into space before becoming active. Also, by tapping quickly, I could make it so that two tabs would be highlighted at once (one in the icon-on state, one in the icon-off state but colored blue like the active tab).

I tried the tab demo app (ionic start myApp tabs) and encountered similar behavior on my iPhone. However, the Mallzee app (built with Ionic) did not have the issue.

Any suggestions on what I may be doing wrong? Do I need any plugins or do I need to make any special settings in Xcode before building?

Thanks in advance!