I figured out my issue. I opened up the toolhead and found some small pieces of broken filament in the extruder gears. After cleaning the gears and installing everything back, I am able to unload without issues. I tested with both AMS. There is nothing wrong with the AMS or PTFE tubes. The culprit was the extruder gears within the toolhead. Please make sure you perform maintenance or else you will end up with this problem. I hope this information will help.
Thank you.