What I'm missing there in Pro. Always do that in arcmap but, in Pro I have a problem.
Like you can see, I have a polygon selected to cut named "Système de canal de NY".
Before with selection
I do my cut just just over the red polygon an, like you see I have now two polygon "Système de canal de NY".
Unfortunately, the selected polygons have disappear in the process. So I can't know which one to delete since even the flash doesn't work to highlight each of these. Never happen in arcmap.
After the split