In the chart of trends in how people meet, there is a suspicious uptick in "at a restaurant/bar" in the last few years... that is totally just a cover for people who met on Tinder and then got serious.
(If only because I want to avoid the "tinwhat?" discussion.)
I'm assuming this was a spell check issue. Stigma is the appropriate word here. Stigmata are these:
A will grant that it's sometimes used in the medical literature to mean "a clear, diagnostic sign of some illness", but the allusion there is to the stigmata of Christianity.
I've never, ever seen it used to mean the plural of stigma as the word is commonly used in English.
Still, I was wrong.