Hello, I have a HTC One M8 running Android 6.21 on Verizon. My Play Store App is set to "Auto-update apps over Wi-Fi only," and that has worked without issue since I got the phone almost 2 years ago. However, since upgrading to Marshmallow, apps don't auto-update at all. I've tried changing the update settings to do not update and back again, to no avail. If anyone has any tips on how to fix this, I'd really appreciate it.