For the last couple months our Z2 tablets (we have two) have periodically had apps stop. Facebook is the worst. I followed all the normal instructions, including clearing cache, resetting, etc. As a next step I reset to factory, and still had the problem after installing my apps. Then I used the Software Repair using the Xperia Companion, to no avail after installing my apps. Finally, I used the Software Repair, and didn't install any third party apps. The first app causes the problem, no matter which app I've installed first (I did the Software Repair a couple times). Since both my tablets exhibit the problem, and the problem does not seem tied to a specific app I install, I'm really starting to think there is a problem with something I don't have a control over. Anybody else having this trouble? My tablet has Android 5.1.1 and is build# 23.4.B.0.319 and from Verizon. Thanks!