I wanted to share a quick update on this issue. We've been digging into these reports, and we believe we have found the issue. As of about an hour ago, a fix has been deployed which we believe has resolved the issue. If you're still seeing problems with your application, please restart or redeploy to ensure you have the latest changes. If the problems persist, please open a case with RStudio Support.
I apologize for the disruption this has caused. I will post more information here as necessary.