Steps to Reproduce

1. load a book with 2 blank sheets
2. enter =B1+ at Sheet1!A1, don't close the edit box
3. select Sheet2!C1, press enter
4. input 1 at Sheet1!B1
5. input 2 at Sheet2!C1
6. select any cell in Sheet1, input 3

Current Result

• unable to input any characters in any cell in 2 sheets
• you have to double-click a cell, enter edit mode, then you can input values
• press F2 cannot enter edit mode

Expected Result

can input values without open edit box (entering edit mode)