I've not had a problem stirring in a primary, but once made the mistake of stirring a CO2-laden wine in a carboy. I thought I had sufficient headspace ... but was quite mistaken. What I got was a purple volcano. In hindsight it was amusing, and mostly foam, so I only lost 4 or 6 oz of wine.It's generally when I stir it up after the addition. I'm a fan of stirring, I'm not excessive, but I do stir through about day 4.
Good judgment comes from Experience. Experience comes from Bad judgment .....
It can happen to any wine if the solids provide nucleonic sites for the CO2 to accumulate. Always go gently on additions + stirring.I did dumped it all and then it was too late. It’s not the first time I was adding nutrients to active fermentation but never to a kit and it never reacted the way it did