[Q] Factory Reset cannot performed after root is removed topic

Before I do factory reset, I removed the root under SuperSU settings.
But unfortunately, when I try to do factory reset, my phone rebooted twice and starts normally.
THE ROOT GET BACK AGAIN AND FACTORY RESET DOES NOT DONE!
It seems recovery mode has some problem, don't know what problem is it.
Is any way to fix it? MY PHONE IS ZENFONE 5 (T00J)