Agree with what the others have said but also, we are all different.
The short answer is when these cravings come along, up your nic a bit to get past them.
Over the years, to those that have tracked these type of posts, it' seems pretty common that those that aren't around smokers hate the smell of burning tobacco (not to mention the stench of ashtrays) and have to work hard not to be one of those ex-smoker nazis. Those that are around smokers still enjoy the smell of fresh tobacco smoke.
I've been vaping six years yet have four to go to my 6th vaperversary. It was a real struggle for me to quit by vaping, 43 year smoker, until I discovered this site and its wonderful posters. The unanimous recommendation from the (many) multiple posts I read was that I needed to up my nic. Went from 18 to 24 and quickly quit the cigs for good.

(Mind you, this was on "old school equipment.) Some people just need a little more to get over the initial "hump."
Wasn't too long after that that I stood up one day and nearly passed out from nic OD. Over the months and years each "dose" of nic would become too much and I'd drop a level again.
I lived as a ex-smoker closet "nazi," yet every once in a while I'd get serious cravings. Turned out I wasn't special, it's a common occurrence and your best defense is to always have a bit of stronger nic to curb any weak moment.
More than a few ECFers have said grand, heartfelt goodbyes to their friends here, said they were so over vaping, would never smoke again, were selling their gear, audios. Most of them also came back after to reverting to smoking on down the line, had tried to quit again and found it much harder the second time around.
It sounds like, from what you say, just having a tank with a littler higher nic in it for those situations will help you a lot. I'm six years in, hate,
hate,
hate the smell of cigarettes yet still occasionally have those cravings.

Six months isn't bad, I think the norm is about three months for the fist serious cravings. (Our beloved
@Robino1 used to say, I think, the cravings were 3 day, 3 months 3 years. She had a great spiel on it, I don't.

)
You're doing fantastically well so far, congratulations on your six months!

Know your weaknesses and be prepared for unexpected stresses and carry a a wee higher nic with you. Those tempting moments of weakness, even if brought on by extreme stress, will become easier to handle once you've been forced to go through them a couple of times but no guarantee they'll ever go completely away--which comes off far more ominous than it would be if we were talking face-to-face.
You're doing great, keep it up!