Could you kindly tell me which firmware version are you currently on?
(settings> system > about phone > software information> build number)
Please also send me your serial number by PM for a check.
(settings> system > about phone > status > serial number)
Sorry for my late reply.
I would suggest you update the firmware to the latest WW-188.8.131.52.
And reinstall the Bootloader Version V184.108.40.206 from Asus support page.
Unlock Device App: Unlock boot loader(for Andriod P)
Have a try. Thank you.