G Police "pixel decomposition" in both psx cores

Hello everyone. I have an interesting situation which I’ve never seen before while using the psx cores.

When running G police on both psx cores, certain pixels seem to leave trails, sort of like a motion blur effect, but the trails never disappear. In no time, the screen becomes a mess of lines and pixels. The game seems to run excellently otherwise, and other games have run wonderfully up until now. Has anyone experienced anything similar?

Specs: Nexus 5 T-Mobile 2.26 GHz snapdragon Android 4.4.3.