No or VERY low water flow

Our Samsung French door fridge has an issue with water flow. Very little if any comes from the water dispenser and the unit has very little to no ice production in both top and bottom units. I have confirmed good water pressure in the supply line to the fridge. This issue seems to have started after a filter change several months ago. After changing filters, I did notice a reduction in water pressure from the door water dispenser. However, I contributed this to the filter. Upon changing the filter the next time, the water would dispense fine for a second or two, then quickly diminish to a very small trickle, or even stop all together. I have tried to run lots of water through it thinking it could have been an air bubble, but it never improved. I also put the old filter back in but had the same results. One time, after changing filters over again, the water pressure was back to normal, but it only lasted a few hours and went back to the trickle. I can hear the water valve activate in the back when depressing the water dispenser. I have raised the temp in the top (refrigerator) section for a couple weeks to see if something was frozen. Although I’m not convinced enough it was a freezing issue (due to the full pressure I had experienced when swapping filters) to pull everything out of the whole unit to let all warm up. I would be grateful for any suggestions anyone might have.