I can confirm that this happens. I tried dragging over a Mnemonic, and I don't get the image.
I asked the Switcher team, and they have the following workaround:
Once you drag and the Mnemonic over, you get the following code in your grid:
<widget baseoid="9363" baseurl="http://10.64.168.31/tmp/_nocache_innersimpanel2.xml" widgetid="com.rossvideo.carb.mnemonic">
<config>
<params>
<param oid="ColorOid" value="13760"/>
<param oid="IndexOid" value="13761"/>
<param oid="MnemonicPath" value="mnem_0_2_"/>
</params>
</config>
</widget>
If you take the http address from the baseurl at the top, and copy it into the MnemonicPath, then it should show the image. For example:
<widget baseoid="9363" baseurl="http://10.64.168.31/tmp/_nocache_innersimpanel2.xml" widgetid="com.rossvideo.carb.mnemonic">
<config>
<params>
<param oid="ColorOid" value="13760"/>
<param oid="IndexOid" value="13761"/>
<param oid="MnemonicPath" value="http://10.64.168.31/tmp/mnem_0_2_"/>
</params>
</config>
</widget>
Then the Mnemonic image appears.
You will unfortunately have to do this for all the Mnemonics you drag over.
#DashBoard