Just wanted to chime in about this issue. We call it "Review Hijacking" and we've been seeing it more and more. We're actually starting to keep a history of any product title changes and also show you the different product variations that are being reviewed. On your second example, (https://reviewmeta.com/amazon/B07FSW8VMQ), you can click the link under the picture that says "See 3 product variations" and it will show you exactly the breakdown of reviews that come from a log carrier bag and a nut milk bag...

The first example is a little trickier since the first time we analyzed the product, the title had already been changed. (You can click on the "Title History" link for any product).

We're working on being able to detect when these changes/variations are normal or being used to deceive shoppers. It's extremely easy for a human to immediately tell, but much harder to train a computer to do it. For example, a seller might have a t-shirt with different product variations: "Large Blue", "Medium Green". These are very different words, but obviously a legit reason to have a bunch of variations.

Here's more info about Review Hijacking: https://reviewmeta.com/blog/amazon-review-hijacking/ and here's an article that BuzzFeed News recently did: https://www.buzzfeednews.com/article/nicolenguyen/amazon-rev...