Thank you for reaching out and sorry to hear you are having issues with the slow prototype interactions. Is it possible for you to share the link with us so that we can test it at our end? Are you facing issues in desktop preview or with the prototype link in the browser?
I'm having a similar issue when previewing my old and new files on the desktop app. I tried to reinstall Adobe XD, this seemed to solve the issue for a few hours, then the issue came back. I'm using the latest macOS.