I opened a bug report for this earlier but I can't find it, I have some additional information.
So again, this bug only happens occasionally, but when it does it is NOT INTERMITTENT. When it takes effect the button to release weapons consistently does not work on that server until it is restarted.
Additionally, when it happens, the third person camera can no longer be panned with the mouse. Instead the OS cursor is visible even though there is nothing to select or click on in that view.