Hello MiOK, we haven’t received any report about this behavior.
Please let me know if Intel Rapid Start was working OK with the previous BIOS version 0047?
Are you using version 18.104.22.1683? Download Center
Check the steps you need to follow in order to enable Rapid start. Here is the guide, Please check if you are missing something Download Center
Let me know the results in order to report the issue.