I agree, the nectar spots are well defined , but OP yellowing areas are sort of faint roundish, larger then nectar spots. That's why I think it's related more to excessive water retention.
my Alo 'Poly' are super sensitive to amount of water I keep them very tight in small pots for that reason especially when young and small.
So here's my newish rooted cutting of P. gloriosum : new 3 leaves popped in last 6 mo, so growing fast. It's in 1qt transparent pickle deli container 😏. Barrel pickles are glorious too 🤣. So far no spots. It's in Fl so high humidity about 65-75 % and 75-77 F temps.
