Firefox autofill text field corruption

Occasionally, when I am typing into a text field on a website, or the search box in the browser, Firefox 89.0.2 on Linux Mint will display a drop-down that is corrupted. The corruption appears to be black and white, with tiny boxes of varying size, like a small graphic of tiny black and white rectangles. I’ve only started noticing it in the past month or two, and it doesn’t happen more than a few times a week. Usually, canceling and typing to make it show again fixes it immediately. Has anyone else had any experiences with this? What is the best way to gather more information about what could be causing it. A quick search for corruption browser text field and a few other similar searches didn’t come up with anything that looked related.