I was having this same issue. My issue was resolved by having an index that was not disabled on the host since it was an intermediate forwarder. ... View more

Give your Single Value an id in xml and apply a css file to the dashboard that changes the text size in your single value via id. ... View more

I know this post is old, but in case the answer here doesn't fix it for folks, I recently resolved this issue myself by removing an fields with a "." character in the name. Looks like it was breaking the ability to append. ... View more