Beard loss after one IPL treatment for acne redness - Is it new hair growing back? How long does it take to look normal again?

I had one IPL session for acne redness 3 weeks ago. I didn't shave prior to treatment (since I just don't like shaving) and just trimmed my facial hair short (about half an inch). A diffuse area of my beard was singed and looked curled. Most of curled hair, kept growing for about a week. Then, some started to fall out. I shaved out of panic. The treated area looked bare for a week. Now I see some short fine hair+small black dots in close look.The wavelength was 480 nm. Skin type III-Dark hair