It's not just this review. I started checking older reviews in Firefox, Safari, Chrome, and Opera. It's the graphs, not the browsers. Here's a typical one:
My personal favorite, resembling kindergarten scribbles:
Am I the only person who noticed the corruption? Checking reviews, it began happening around January 2018.
Dec 22, 2017. Crucial MX500 1TB review. Graph is clean.
Jan 10, 2018. Crucial MX500 500GB review. Corruption present.
It appears the graph data avoids an elliptical region in the upper right corner. But the ellipse size and proportions vary by graph.