BUG at different planes

[DiegoJJJ]

Hi everyone.
Can you please tell me, why is this happening? I have two planes: Swimming pool (elevation -170cm) and regular plane (elevation -30cm).

When I close a room in the regular plane, it gets bugged like the image below:

https://imgur.com/a/UBT8DcD

How can I solve it?

Thanks.

[Puybaret]

I’m not sure because you didn’t include the level tabs in your screenshot, but you should select the level where the new room will be added before drawing it or create another level at an elevation where the room should appear.
You also didn’t explain the purpose of the room you try to draw.