I made 5 panel doors w plywood inserts and hardwood frames 3/4" thick. I grooved all the frames and used pocket hole joinery and Titebond 111 for assembling frames.
Big mistake.............the 1 1/4" screws have no holding power because of grooves. A 2 inch pocket screw is too long and penetrates the face side.
Are these doors salvagable. Mending Plates? Thinwood backing for door frame?