QuerySave event is not called anymore

[booltrue]

I use in my LN application 3 action buttons:
"CreateNewDocument" with @Command([Compose];"";"form")
"ExportToExcel" LotusScript code
"DeleteAllDocs" Lotus Script code

If I create a new document saving from the menu bar or from an action button works properly as expected.

If I call "ExportToExcel" I can not save a newly created document anymore by calling save from the manu bar or save from an action button.
The QuerySave event will not be called. Waiting for about 30s, then saving works again.
If I close the tab of the view after creating a new document, the save message box appears and saving is possible directly without waiting.
The QuerySave event can be called then.

If I call "DeleteAllDocs" I can not save a newly created document anymore by calling save from the manu bar or save from an action button.
The QuerySave event will not be called.
Also waiting will not help, only closing the tab of the view after creating a new document and cofirming on the save message box saves the new document.
The QuerySave event can be called then.

I have not figured out the problem yet. Any ideas why that happens.

[booltrue]

I just figured out, if I use an action button with a save function, it works properly.

I tried the save function from the menu bar as explained before on another client version 9.x.x,
and there it gives me an error message, that notes is busy.