Description:
In iOS 13 some keys on a hardware keyboard that previously didn't work now do something. It seems, that the tab key (tabulator) doesn't do the right thing in a spreadsheet.

While the tab key moves the visual cell selection the focus seems to jump to the horizontal scrollbar. See "Steps to Reproduce" below for more information.

Steps to Reproduce:
1. Open a spreadsheet on iOS 13
2. Enter "hello" into a cell
3. Press the tab key on the hardware keyboard
4. Enter "world"

Actual Results:
The letters typed after pressing the tab key won't show up.

Expected Results:
The letters typed after pressing the tap key should show up in the cell next to the one which shows "hello".


Reproducible: Always


User Profile Reset: No



Additional Info:
It's also not possible to move the cell selection with the arrow keys but when using the left/right arrow keys one can see that the horizontal scrollbar moves. 

To me it seems that the tab key doesn't move the focus to the next cell but to an other widget.