Yellowing Plastic

I just took my alternators Meistor out uf box to transform him and I noticed his rear bumper and the triangular shaped plastic on his hood where his head would pop out in robot mode are yellowing. Anyone else having this issue?
SEIBERTRON - Your Planet For Everything Transformers
https://www.seibertron.com/energonpub/
https://www.seibertron.com/energonpub/viewtopic.php?f=4&t=13826
SpacerAM2 wrote:Mine had the same problem when I bought alternator Jazz by December of last year at Walmart. It had some yellowing inside the hood ,and it was dirty too a bit in the center. It also had some yelowing in the rear. When I move one of the arms to pose him the arm came off easily every time. I end up returning him ,and got a refund. It was a nice figure but felt dissapointed with the quality. I don't know if all of them are like that.