XF 1.4 Font colors when editing old post

I can't seem to get font colors working when editing an old post (or any of the style stuff for that matter). When I use the colors on a new post they work fine but on an old post the pop up with the colors is not visible until I close the edit box and then it will be visible further up the thread. If I select "more options", I can then see the colors when they pop up. Would this be a z-index thing?
 
There's no reason for this to vary based on the age of the post. It'll be the same HTML behind it.

Can you reproduce this on the default style with add-ons disabled?
 
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