A good product changed to BAD

I bought 2 x WW Food Free Range Fresh Chicken Gravy. After using the first tub I picked up a distinct plastic taste from the gravy. I threw it out and used the second one today. Again the plastic taste. What's wrong with the product? I was always so good. Bar code: ********** 566233 Sell by date: 13 Aug Use by date: 18 Aug 180703 Bought it from WW Nina park Pretoria North Now a second meal for my mother who recently had a stroke and had a change in smell and taste but who loved this product, is ruined and I have to start all over again. Seems I can't trust WW anymore.