I discovered the fastest way to rectify this is as follows:
First turn Sync on, set fan speed to max, turn on all zones (defrost, forward, downward)
Now wait a moment maybe 7 seconds for the vents/flaps to finish moving.
Second, turn off the forward vent option.
Wait again 7 seconds.
Third turn the forward vent on, turn off defrost, and turn off downward vents.
Wait again 7 seconds.
You'll notice at this point the vents will make a different pitch/tone sound where it sounds (and feels!) like the air is moving in a very unrestricted manner.
Enjoy
First turn Sync on, set fan speed to max, turn on all zones (defrost, forward, downward)
Now wait a moment maybe 7 seconds for the vents/flaps to finish moving.
Second, turn off the forward vent option.
Wait again 7 seconds.
Third turn the forward vent on, turn off defrost, and turn off downward vents.
Wait again 7 seconds.
You'll notice at this point the vents will make a different pitch/tone sound where it sounds (and feels!) like the air is moving in a very unrestricted manner.
Enjoy