I did some cursory reading and read that too much sun can cause white/black spots, I keep it next to a south facing window but it's not getting completely baked out in my lawn or anything. Is this normal/fixable?
Black spots can be caused by humidity also, not saying that's what is going on here. I would watch it now that you have moved it out of the sun, if the black areas start getting larger and mushy some surgery might be in order. Hopefully they will just cork over and leave some scars.
Thanks for the advice, my place is air conditioned but it's an old house so I'll have to keep a closer eye on humidity as well. If I had to do surgery would that entail just chopping off the entire section or just removing the blackened parts?
If the black stuff starts getting larger and it starts getting mushy you want to amputate below the infection. If you are seeing black in the cut wipe your blade w iso and cut lower until it looks clean, dust the wound with sulfur. Yours does not look like it needs this in the photo.