I have been running unrooted for a while and safetynet has been working. Yesterday I was trying to create a shake action on tasker to lock my phone when I realized that it causes my camera app to launch. So I deleted all my xposed app (including xposed installer) then reflashed. Although I had been running unrooted I hadn't deleted all individual apps. During those times, safetynet was working, but after I reflashed again with unrooted (to make sure all deleted xposed apps cleaned out), safetynet has been failing.
I'm using 2.6.1 stable with cleanslate kernel and unrooted option. Now SafetyNet always fails. I downloaded an app to check safetynet status (SafetyNet Helper) and I got "CTS profile match: false". What can I do to troubleshoot SafetyNet failure?
EDIT: I try to do different options including installing stock kernel and I still get CTS profile match being false. Not sure if it's relevant, but during the ROM install I noticed that there are the following lines under "Magisk Uninstaller" section:
! Boot image backup unavailable, try using ramdisk backup
* Dumping boot image
* Unpacking boot image
! No ramdisk backup found
! Unable to revert 100% back
! Will still remove Magisk additions