So your a/c is a self-contained unit with Evaporator Coil outside in Condenser Unit and not inside above your Furnace ?
If so, you could have a Limit that is weak and not holding.
IF you have no blockages through an a-coil or down in the duct and blower running full speed, then it is getting correct airflow.
If Limit is tripping, it is most likely weakened and just not holding.
When you suspect it is happening, you can turn power OFF, remove door and quickly test all Limits to see if any are open.
Remove wires and test for continuity.
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?