There is certainly no rhyme or reason when it comes to hot flashes, everyone is different. I will often get them after having a sip or two of wine or coffee. Sometimes just hot meals or drinks will trigger one other times in the same circumstances I will not get any. My hot flashes will disappear for a month or two, then come back for a few weeks then disappear again.
I will have an anniversary on May 15th, it will be one year since my last menstruation

... we're gonnna have a parteeeee

bring on the wine

... But then again I don't need much of a reason to drink wine, eh Leenie?