Most likely, you have finished the lip balm way before the shelf life expires. If stored in a cooler place, these balm(s) last for up to 6-8 month and depending on storage, even longer. The beeswax increases the shelf life.
The lip balms may change their consistency, appearance, and taste when exposed to extreme temperature differences, e.g. when the lip balm is melting and hardening again. This is due to the fact that no preservatives or additives have been used. The properties, e.g. moisturizing, will not be affected.