Does anyone experience this? I have had ongoing throat issues that come and go, and they noticed it the other morning after drinking kratom tea... SWIM figured it could be from smoking, but realized they hadn't smoked many cigarettes at all that day. It has been a sore feeling similar to a common cold, but they also have this cool, menthol-like feelinig in the back of their throat. I have noticed their mouth and throat get slightly numb when drinking the tea. I am using about 1-20grams of dried leaves in tea, they don't think it's a bacteria from the source as this should be killed in the boiling water. I have searched online and heard multiple complaints from users, has anyone here experienced anything like this?