I previously had purity rom on my nexus 10. I decided to back to stock and use the xposed framework. So with 4.4.3 I flashed the stock images (manualy so it didn't wipe my sdcard partition), wiped data, cache and dalvick.
Stock 4.4.3 works fine, no issues here, but in acquiring root by flashing supersu update (both 93 and 99r3) root doesn't seem to stick. I can adb in and su from terminal, but when booting android supersu days it couldn't acquire root. I have tried other clockworkmod recovery and team win recovery so see if it was a bug with recovery, but no dice. Clockwork did occasionally say it lost root and press Yes to put it back, it did this on my nexus 5 and I still kept root.
I have even tried the universal nexus toolkit but that didn't work either. All methods I have tried have run the zip output fine, saying success.
Any ideas what's wrong. I assume I have done something wrong but can't find much information about root not working like this.