Change in my transplanted hair

First, thank you Doctor for your years of good advice offered through your site and elsewhere. I am light skinned, 65 and have been on Finesteride for 10 years, had a FUE procedure with an outstanding surgeon in Thailand 9 years ago, and found that I was among the 5% who never shed (perhaps due to blood pressure on the high side?). The untransplanted region in the rear of the crown seems to have thinned over time, but not profoundly and I have considered the procedure a success, until now. Recently I believe that the right side of my frontal hairline may be undergoing some sort of change, where a patch of maybe 15mm by 10mm seems to have hair that is both thinning and maybe only 80mm long. The symmetrical area on the  opposite side of the hairline is unchanged the hair long and as full as transplants typically are (i.e., not especially, but cosmetically impressive). Apart from any comments you might care to make concerning the possible cause, could there be reason to believe that this situation could recur even after an second FUE?  Thanks so much.

You should send me some photos. I saw a man recently (https://baldingblog.com/2017/08/14/im-60-and-lost-my-forelock/) who developed an autoimmune disease of the scalp/hair. Photos will help me better understand your situation.