I am having a problem because I got crazy with my tne dose. 150mg preworkout 4X a week. At 50mg I notice nothing, at 100mg I can tell I took it, 150 I'm swole and in total beast mode, till I get little bumps on my nips. So yeah, it absolutely can bring on gyno if used irresponsibly. Responsibly used, as I have for years at 75 to 100 it is a great pre workout. Just keep it for your big lift days, say 2X a week and you should be fine.
I use it solo, and sometimes with tren base (trenx). Trenx is better, but I have bottles and bottles of tne 100, so I've been burning it up. Not anymore though, I would never go over 100 3 days a week max. My issue started while running it on top of 350mg test c and 350mg deca. I've run test at 500 with the same ai dose I have been taking and was golden, the crazy tne game I played got me tho. As always, it's about responsible use. If you don't see much at 50, 75 is a safe dose in my experience, but we all react differently.
Edit: I began aromasin at 25mg ed Sunday as soon as I noticed it and already see improvement. Bloods will be drawn tomorrow (tuesday). And mine also came literally out of nowhere. I'm not gyno prone at all, and a long time ago when I didn't know shit ran test e at 500 for 12 weeks with no ai and didn't have any gyno issues, tne DOES aromatize highly.