I've used this for years- never noticed a sweet aspect
I don't depend on it to completely flavor a dish or stock- I just enhance with it and have never had this come up- I wonder why it would be sweet sometimes- I certainly think Better than Bouillon is the best of the commercial products I've tried. It is just too much work to make my own. I wish our Costco on Kauai carried it- I pay over $8/jar for it!