Marauder pistol/Wood Grips/Trigger reset

Marauder pistol. Wood grips installed, trigger would not reset. Removed the grips trigger reset fine. Reinstalled the grips perfect. Anyone know why this would happen? I am assuming the wood grips were binding on the trigger somewhere, but I looked and cannot see it. Has anyone had a similar experience?
Don’t tighten the grips too much, particularly the right side that has the removable plastic plate.
 
Don’t tighten the grips too much, particularly the right side that has the removable plastic plate.
That is what I figured. I thought when they made the grips they would have made a provision for that but I guess not.. Do you know if it can be corrected by sanding the grip out a little or should I just live with it as it is - not that tight.