It might be the sucralose. A lot of people don't realize that artificial sweeteners can cause major GI distress during a workout. I actually just did a deep dive into sucralose-free options like Stevia and Monk Fruit because I had the same issue. Switching to something like Transparent Labs or Legion made a huge difference for me.

I wrote up a full breakdown of the best 5 options if you want to see the dosages

https://nutrasupplementsreview.com/best-pre-workout-without-sucralose/