Updated:
Starting with v19.1.5 we've reverted this fix because this behavior is correct and can be reproduced using standard HTML elements with the following markup:
HTML<table style="width: 100%">
<tr>
<td style="background-color: green">
<div style="width: 100px">1</div>
</td>
<td>
<table style="width: 100%;">
<tr>
<td>tokebox</td>
</tr>
</table>
</td>
</tr>
</table>
The longer the second cell's text will be, the bigger part the first cell will occupy. This is cased by the Automatic table layout algorithm that calculates columns' width proportionally to their content size.
In addition, this fix caused other issues when a tokenbox was used in the ASPxFormLayout control.