Hey folks, I have 2015 f150 5.0 roughly around 170k miles

lately when I start the ac it be cold for couple mins then the air is no longer cold . I refilled it not that long ago maybe few months ago and this problem start happening recently . I look at the compressor , it kicks in and circles when I turn the ac on so it’s working . Anyone experienced this problem before ? Some people also recommend checking the air gap on the compressor but would that cause what I am dealing with ??