Good News! Adobe says this morning that the issue is fixed and they are working to restore any lost comments.

Yes, scary. I also think it’s a glitch in their servers. The issue has been reported by a few more users on the Adobe Support Community; but, so far, there isn’t a solution. Here’s the response from Adobe as of 05/18/22: “We’re sorry for the inconvenience caused. We’re able to replicate the issue at our end. Our engineers are working to resolve this as soon as possible. So stay tuned for updates, and thanks in advance for your patience.”