Interesting. I haven’t had the good fortune of experiencing this. Sadly, though, since it is a Chrome issue, it’s an Electron issue, not a bug with Obsidian—so I’m sending this one to the graveyard.
Is there a way to turn off that setting in the Obsidian-hosted version of Chrome, as you can through Chrome settings? When I toggled off hardware acceleration in Chrome, the bug went away, but so far as I know there isn’t an external way to change settings on a hosted browser canvas unless it is surfaced by the host app.
Back in the day on Windows, I would run into things like this with hosted IE, and there were ways to poke the registry to do it without needing a UI, but not sure if there is any equivalent to that with Electron on the Mac.