Problem Description:

after merging and unmerging cells, there at least 2 errors we saw.
First, we cannot input any text into some cells of those merged cells.
Second, some cells lost its background color

Reproducing Steps:

1. displaying attached file in Spreadsheet
2. select 9 cells with background
3. select "merge across"
4. select "merge cells"
5. select "Unmerge cells"

expected:
all cells revert back to original status.

Actual:
As description said, there are 2 obvious problem.
Input area of some cells become very narrow and entering text cannot appear in the cell. The background of 4 cells disappear.