While I’ve experienced this as well when I vaped using nicotine. I’m not sure if it’s happened since backing off thou.
Yes all the hypothesizing on the vaping and tricking the body those all sort of make sense but mastication needs to take place for Amylase to secrete for digestion to take place in the mouth. But then again there are other secretions outside of Amylase.
Nicotine like what @Beaufort_Batches was discussing it relaxing stuff. Here’s a blurp from google
If you smoke or chew tobacco, stop. The nicotine from tobacco relaxes the valve between the esophagus and stomach (lower esophageal sphincter). This can allow stomach acid and juices, the chemicals that break down food in the stomach, to back up (reflux) into the esophagus, which causes heartburn.
So there’s another proposal the LES ( Lower esophageal sphincter ) becoming too relax allowing a flap so the acid can now travel up instead of headed in the opposite direction to digest your food.
Just curious if any non nicotine vapers are experiencing it ?