The coconut may contain some molds if its dried and it should contain some sugars, so I would be wary of this in your diet.
If you notice any mucus production after eating food, then this is an allergic reaction. This can be in the form of a cough with mucus, runny nose, or even a drippy mucus in the back of the throat.
Mucus production protects the candida and hears a link about it:
Kefir contains sugar so you might be reacting to the sugar or dairy. However, the benefits of the kefir should outweigh any consequences.