So everything was up and running nicely on my 8a, when all of a sudden it started dinging like mad with notifications. I opened it up and it was continuously coming up with a warning saying 'This device isn't Play Protect Certified. Contact the device manufacturer or retailer and ask for a certificate'. It wouldn't stop. I eventually ended up just reinstalling for speed as I was due to leave for work. I have no idea what caused it, but it was concerning. I though Google had broken something in GOS at first! Has anyone else had this issue? My phone was pretty much unusable while it was like this. It's been fine so far after a fresh install, but I really don't want to have this problem again.