Android 7 - HTC 10 tab/search bar not displaying properly.

[AC Question]

So my HTC 10 has just updated to Android Nougat and I am experiencing issues with the tab/search bar not displaying in the phone and messaging apps. I found that if I change the screen size in the new settings (this makes everything look bigger or smaller) the tab/search bar returns however I do not want to have massive or tiny icons etc. Has anyone else encountered this? If so, how did you fix it?