Couldn’t get pics cause I left my third hand at work but, I believe he does have a split wing on his right side. His left wing had what looked like a emerging feather (apex or whatever they are called). Could he just be in his first partial molt? I don’t think he is going thru a full molt, he is only 8 mo old.
At around 6 months of age or so a bird should have shed their juvenile feathers and grown their mature feathers in. Those feathers stay until their annual molt which occurs at around 12 to 18 months old. I thought maybe the same thing was going on in my SW cockerel, that maybe he was still shedding juvenile feathers and growing in his new ones. So I waited and waited for the wings to right themselves and they never did. I noticed that his wings weren't right very early on, but thought he might outgrow it. I had never encountered split wing before but the moment I researched it, I knew that was what was wrong with my cockerel's wings. Your bird is highly suspicious for split wing, but you can wait it out a while and keep a check on it. Split wing makes the wing itself weaker and the bird doesn't hold the wing together right.