"Subheading" changed to "Paragraph with subheading" ?

Hello Solveig,

Happy to help!

We're not seeing other reports of this behavior in the community so the incident may be isolated. Can I ask if you have collaborators added to the course? This might explain seeing changes that you didn't make. 

If you're the only contributor in the course, please open a case with our support team here if you encounter the behavior again so we can investigate.