Have you seen a chiropractor?
May need an adjustment to realign your hips.
You may be making compensations for the tight left hip.
Is your hip in the front of the socket?
You may be hitting bone to bone early which is the “hits a wall” feeling.
It may not be classified as a big issue, however, that doesn’t mean it doesn’t need attention.
Have you had anyone look at your squat technique or video your squat technique so you can see exactly what is going on?