I have to put a background image on a <TD>. This background image display well when I open my email via Gmail App on Android 5, but only when images are displayed by default.
If I configure Gmail with "Ask before displaying external images" and then ask for displaying images on my email, standard images display well, but not background images...

sample code is really simple :

   <table width="600" border="0" cellpadding="0" cellspacing="0" align="center" style="width:600px;margin:0 auto;padding:0;">
      <tr>
          <td width="600" height="100">
              <img src="my/path/classic_image.jpg" style="display:block;border:0;" border="0" width="600" height="100" alt="image displayed when unblocking images">
          </td>
      </tr>
      <tr>
          <td width="600" height="100" background="my/path/bg_image.jpg">
              no background image when unblocking images
          </td>
      </tr>
   </table>

Can someone confirm that it's a "normal" behaviour on Gmail App? Is There a fix?
(I MUST use background image...)

Thx