Scuffing
On the G10 plate, if nothing else helps, you can try scuffing the plate to improve adhesion.
Warning
Do this under running water, or outside with proper ventilation/PPE. You do not want to breathe in fiberglass/g10 dust.
Get some 0000 steel wool or maroon scrotchbrite pads.
Lightly scuff the surface of your plate.
Use a side