Originally Posted by
pkcable I know MUCH less about the technical side of things BUT I do know a couple programmers that are regulars here, @
EgoAnt & @
KermEd who MIGHT know the answer.

And the solution is very simple.
As reddit user JSSR1234 suggested for blocking nfc signal from daydream viewer.
By getting aluminium fold, folding it up a bunch of times and putting that between the phone and the lid. This stops it from reading NFC and it seems to be working fine. Tested it for a few minutes with different games and I have never been able to play this long before!