Empty cells with tabindex are skipped

[Andreas-Englisch]

The problem is related to https://github.com/FreedomScientific/VFO-standards-support/issues/403. The problem described there still occurs when there are elements with tabindex in the cells.

The problem occurs with JAWS 2020, 2021, 2022, and 2023. The problem does not occur with JAWS 2019 and earlier.

The problem does not occur with NVDA.

The problem occurs in Chrome and Edge, but not with Firefox.

Example (The empty cells in the last and second to last row are skipped):

<table>
    <tr>
        <th>1
        <th>2
        <th>3
        <th>4
    </tr>   

<tr>
        <td>a
        <td>b
        <td>c
        <td>d
    </tr>   
<tr>
        <td>x
        <td><div tabindex=-1><span></span></div>
        <td><div tabindex=-1><span> </span></div>
        <td>y
    </tr>   
<tr>
        <td>q
        <td><div tabindex=-1></div>
        <td><div tabindex=-1> </div>
        <td>v
    </tr>   
</table>