This happens to me about once every other month. Millions of words, I don't expect it'll ever stop happening.
Bonus points when the word is like only 6-7 characters long, feel extra dumb those months :P
I find this with a lot of niche things I only ever read about, open source names seem to be the worst.
Gnome is allegedly pronounced with a hard G. I've never heard that said in the wild. And I have no idea how anyone else pronounces XFCE.
MySQL had never been "my see-kwull" to me but always "my ess-queue-ell".
Then there's Linux ...
That's how I thought it was pronounced too. NginX could maybe have provided a hint...
The reverse is also happening to me - it has become very hard to see furniture advertised as latex, and read lay-tax, not la-tech.