Failed to pass Google Play Device Integrity

[kcl0801]

So I just bought this phone month ago and I'm very sure it's a brand new one,

it did passed the Play Integrity check at first, but it just failed one day suddenly,

and I didn't unlock the bootloader (which is also impossible right now due to ASUS drop the support),

I've contacted Google support and they reply that I need to contact ASUS so here I am

[Falcon_ASUS]

@kcl0801 
Could you please tell us the firmware version your phone is currently using and provide a screenshot of the error so that we can verify it?

[kcl0801]

System version: WW_18.1055.2305.261

in google play-settings-about-play protect certification shows device is not certified while play version already up-to-date
and I already cleared the apps' storage multiple times