Air Conditioning Issues

[tico821]

I own a 2020 Sx with 55,000 miles. Really haven't had any major issues with it and since I bought it in March of 2020 I have really enjoyed it. Recently on two trips I've taken that have been longer than two hours at highway speeds (65-80mph) I have issues with the AC not blowing through the vents. This has happened after driving for 1+ hour. The AC is still on and hear the blower fan working but it sounds like its just blowing inside my dashboard, no air is coming out of my vents. I can turn the speed up and down and I hear the far ramp up and down but not comes out the vents. I recently changed the cabin air filter (which was probably due to be changed but didn't seem clogged) and I also changed the engine air filter. Has anyone had any issue similar to this. I haven't gotten a chance to take the car on a 1+ hour trip to see if the air filters were the culprits. Thanks in advance for any help.