How to fix the 'Fill' in the section plan

The Fill in the section plan is not being applied correctly where the model is cut. How can I fix this issue?

If I delete the model and re-import it, the Fill appears correctly at first, but after some time, the same issue occurs again.

HI there,

I apologize for the inconvenience. It seems that the section tool is cutting a plane above these rooms. Is there any ceiling plane or material which are blocking these rooms from being seen? Can you perhaps send us a screenshot of how it should look like?

You may also try to enable “Affected by Light”

Thank you.