I could be wrong, but I *thought* I noticed this behavior happening when the Force Combat option was checked sometimes. But that might have been my imagination 

Details:
- There are no addons enabled except for Addon Control Panel (ACP) in order to display there aren't any additional addons enabled.
- There are no plugins enabled, other than the default plugins.
- The pre-loaded Questing setup has been loaded within the CC.
- Per request, eat/drink has been disabled in the CC.
Please see attached video clip and log file.
A clearer picture - YouTube