I have also noticed the drop in sweetness and a slightly different taste in my last order (similar to what @Marcus mentions in one of his threads - All of a Sudden I Can Taste Rice Protein ).
If you guys did not change anything at all, then this is a bit intruging. Could there be such a variation in between batches for any other reason?
The batch number printed on the bag of Huel I am experiencing this is 1993