Rich text box disappears after saving

Hello! I love your plugin and it is helping me a lot. I am using it to create a page with columns,
. When I use rich text to enter text and picture into my columns. If I save and publish and then come back to my page to modify it, I cannot use rich text anymore. The rich text menu does not appear. If I add other colums, same thing. I have to put code…
Can you help?

Thank you!

Pascale

https://www.ads-software.com/plugins/page-layout-builder/