I had this behavior when loading after trying to update the system via Google Play. Running the ADB command:
adb shell pm uninstall com.google.android.captiveportallogin
fixed it. Now my Fuxi loads quickly.
1.Restore everything from TWRP except BOOT
2.Reboot
3.Everything
If you need a more old ROM, then flash it, then flash BOOT from the last ROM that was installed.