Disappearing caret

I have a bug I see very occasionally where the blinking caret disappears. Everything seems to work as normal, as if the caret were there, you just can’t see it. The only way to get it back that I’ve found it to reload the page. So far I have no idea how to replicate it and no idea how to even start debugging it. Any suggestions much appreciated!

I’ve only seen it on Chrome - just because that’s my default dev browser.

We have seen browser bugs like this before, but without a reliable way to reproduce it it’ll be hard to figure out which circumstances cause it, report the issue to Chrome, and/or find a kludge that works around it.