Change in 1.5 flavor between orders

I previously had ordered a box of soylent as a trial, and the powder was pretty good and tasted neutral as advertised. I just got a new box as the start of my subscription, and right off the bat the powder was much darker (more yellow) than before. The taste is “wheatier” than before, and leaves a less pleasant aftertaste. I can still drink it, so it’s not a huge deal, but is this normal? Both were 1.5, so it seems like they shouldn’t be so different. The previous box had an expiration date about a year out, but this one expires next month.
I’ve only had the first package so far, so I’ll post an update when I open the next one.

It’s fairly normal for there to be a noticeable difference between batches.