https://community.sony.no/t5/tablets/nougat-issue-on-z4/m-p/3520338#M8392 <P>Update installed earlier today. &nbsp;Back button no longer works in either landscape orientation, but works fine in portrait mode. &nbsp;Odd issue.</P> Sat, 18 Feb 2017 06:25:03 GMT Bmwdude 2017-02-18T06:25:03Z https://community.sony.no/t5/tablets/nougat-issue-on-z4/m-p/3520338#M8392 <P>Update installed earlier today. &nbsp;Back button no longer works in either landscape orientation, but works fine in portrait mode. &nbsp;Odd issue.</P> Sat, 18 Feb 2017 06:25:03 GMT https://community.sony.no/t5/tablets/nougat-issue-on-z4/m-p/3520338#M8392 Bmwdude 2017-02-18T06:25:03Z https://community.sony.no/t5/tablets/nougat-issue-on-z4/m-p/3520339#M8393 <P>does it happen when you are on safe mode? just long press on the power off option</P><P>try to run xperia diagnostics,.</P><P>and or perform a software repair using Xperia Companion</P> Sat, 18 Feb 2017 11:50:54 GMT https://community.sony.no/t5/tablets/nougat-issue-on-z4/m-p/3520339#M8393 MarlonUk1 2017-02-18T11:50:54Z