Backspace not working on data grid editor

[maik]

Dear all,

I have developed an App that uses a Data Grid. To edit a cell I call
dispatch "EditCellOfIndex" to group TableName with x,y.
Everything works fine in all simulators and under iOS. Unfortunately when I deploy the App to an Android phone (Gigaset GS270 plus) the backspace / delete button of the keyboard is not working. All other buttons (at least alpha numerical) are working. Strangely backspace is also working in other non data grid fields.

Has anyone a solution for this?

Best regards,
Maik