This is mainly due to:
a. lack of conductivity between the pod and the battery,
or b. tiny air bubbles gathered around the wick inside the pod.
For a., try cleaning the contact pins on both the pod and the battery making use of a cotton swab dampened with a bit of rubbing alcohol (without other liquid ). This can restore conductivity between the pod and the battery.
For b., simply take the pod out and gently tapping it (mouthpiece side up) on the table and reinsert it into the battery. The vibration caused by the tapping should release the air bubbles from the wick.
If the issue persists, please retain the products and contact the EVOVE Support Team at email@example.com.