I've had Amazon Basics cables that weren't up to spec, yes. In fact most Amazon Basics electronics products have been poor quality of those I've purchased (mostly cables and a couple sets of speakers) so much that I won't even buy anything labelled as such now.

Interesting. I've always found AmazonBasics to be fine. Not great, but usually gets the job done.

Not directly addressing your question, but Amazon did a recall on their own chargers included with UK and Ireland Fire tablets, and recalled over quarter of a million portable AmazonBasics chargers.