How to stop a triggered loop when it's playing?

I generally drag in large loops into a Groove Agent SE 4 pad to edit the sections I want manually. So when I trigger the key, the entire loop starts to play. However, unless I’m in the “Sample” tab of the waveform editor, there is no way to stop a loop mid way. I feel it’s a very counter intuitive quirk. Is there a way to stop a triggered sample from playing in the middle?

I’m farily certain there’s an option in GA to say - stop playing when you let go of the key. That’s the only way I know of.