Othercat my experience is heartburn came on slowly thruout the years . Dad used to carry rolls of rolaid in his pocket when i was knee hi, older brother same thing , then me. , We all smoked.
There all gone and now just me.
Fastforward
Regardless caffiene, acidic things, smoke -nicotine, spicy foods etc can set it off .
Dont suffer with it , prilosec worked well for me and even less expensive and i use now is the stuff from Walgrrens tha has magnesium in it weather i eat spicy foods or whatever it works!
Lifes too short enjoy it and get something for the heartburn and vape away !