H4350 gone yellow

[338 Imperial]

This morning I found a little time to do some loads for my 338 WM.
Upon opening 2 different & previously used H4350 I noticed 1 now has a slightly yellow/harvest ting to it. Still smells the same. & a small test sample seemed to burn OK. YES>>all my powers are stored correctly in a locked cabinet in my reloading room.
Any thoughts or concerns ?
Ed
years ago had a can of IMR4831 do similar thing..

 

['Boo]

The coating on H4350 has a yellow tinge to it. I would be worried if I bought some current production that wasn't that colour.