There must be over 200 different automatic transmissions on the road in The States today…NO technician can be expert in all of them…Only a Honda transmission specialist has the knowledge to sort out your problem…
From your description, is could be something as simple as fluid foaming causing a drop in oil pressure resulting in erratic operation…But I’m just guessing like everyone else…Have you ever had the transmission SERVICED?? The fluid and filter changed and replaced with the “special” Hondamatic fluid?? That possibly could cure your problem…