Hi
@noel.fornolles18 Same problem happened to me around Dec 2021. It is caused by motherboard failure which used to be caused by ramdump. Search up "zenfone 8 ramdump" if you'd want to know more about it. There was also a discussion about this problem in zentalk forum.
If you have any plans in having your phone RMA'd, you may want to check your IMEI number. My phone went through an RMA and after receiving it, while it has the same motherboard serial number, the IMEI number was changed. At least this was one change I noticed after the RMA and checking the hardware through About Phone and .12345+ or whatever trigger I can use in stock calculator.
For now, there are no problems here with my phone even with the different IMEI number though I hope this will be the first and last motherboard failure that may occur.