Naming / Renaming (new) layouts?

When creating or renaming a layout (type does not matter), the result looks as in picture “Layout1”. After saving, closing and re-opening the file the title of the layouts are always replaced as in pictures 2 and 3.
Is this a bug or what has to be done to keep the layout names?

This is a bug, I’m afraid. I hope it will be resolved in the next update.