Disable Context menu on VM works in Flex, HTML5 menu itself getting disappeared .

Hi have used meta-data filtering to disable my context menu operation on VM using following constraint:-

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  <metadata>

<!-- This filters the actions to be visible only on Chassis -->

<objectType>VirtualMachine</objectType>

<propertyConditions>

<com.vmware.data.query.CompositeConstraint>

<nestedConstraints>

<com.vmware.data.query.PropertyConstraint>

<propertyName>mycondition</propertyName>

<comparator>EQUALS</comparator>

<comparableValue>

<Boolean>true</Boolean>

</comparableValue>

</com.vmware.data.query.PropertyConstraint>

</nestedConstraints>

<conjoiner>AND</conjoiner>

</com.vmware.data.query.CompositeConstraint>

</propertyConditions>

      </metadata>

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It is working as expected in Flex however in HTML5  context menu itself getting disappeared in case of condition is false.

Is this is a by design behavior for HTML5 or is it a bug..?