Thanks for letting me know. Anyway I was fine flashing back stock but then tried some kind of weird op9 pro twrp thing from xda that someone suggested and phone was wiped without me being asked. I flashed original boot but phone just started empty... So nothing I could do. But feel free to try yourself and tell. Me if it works. I am just trying to warn people about this. Your phone your data. I just wish I had this warning before upgrading.Actually you should be able to root, it's no different, why on earth did you wipe your phone?
You should just be trying to boot patched images, not flash them.
If you're already rooted and you're updating to a new OS then the install after ota method should work as expected..if not then just flash the stock boot image