Adobe Illustrator Gradient Tool not Adjusting

I am having trouble with the Gradient tool where it won't allow me to adjust the gradient. It no longer shows the normal gradient "stretch" handle as I click and hold my mouse to adjust the width and position of the gradients in Illustrator. I've worked in this for 18+ years, and this is a new issue. I may have accidentally hit a fast key to trigger some setting on the Gradient tool, but can't seem to figure out how to restore it so it works again as usual. 

Basically, when I try to "adjust" the gradient by clicking and dragging in the angle and distance I want the gradient to run, it just shows a very compressed/short version of the gradient that goes from one color immediately to the next, no matter how long I try to make it expand to. I suspect this is some setting I may have triggered with an accidental fast key. 

This is using Adobe Illustrator 2020 v 24.3 (most updated version of it).
I've restarted my iMac and reopened the file with the same results. Any ideas?