Not a good sign. If it is indeed the switch itself, it will work with a mushy feel but could become very intermittent. More for "phantom" contacts. Warranty is the solution for this.Left button stopped clicking. It's still working but is it going to quit on me? Wondering if I should start looking for a replacement.
Another possibility is there is some residue around the button itself, causing it to be sticky and not free to pop so to speak..?
Either way, a good example of the necessity to have a backup vape.
Good luck.