Texture loading errors Moto G5S Plus

Hi,

I am having issues with textures loading on my Android VR app, as shown in the photos below. It appears to be more or less random which textures do not decide to load properly (generally only one or two at a time), although it is more commonly some than others. This error occurs on my Moto G5S Plus, but not on my Cubot Cheetah 2. No error messages are given during build. After a few times running the app, this error often corrects itself and textures load fine, but this will reset when the phone is restarted. In one instance the app loaded with the lighting not built, giving the associated error message. These instances are all occurring on the same build of the app, with no changes made. Does anyone know why this might be occurring?

Many thanks.