Linear Gradient No Longer Works in Lightroom CC

I have an issue with Linear Gradient after a while it works fine. not exactly stopped working:

When using it and setting the gradient lines in the image the upper image is painted by red as should be but the red color stays on and I don't see any change when sliding the controls. Just after pressing the "Edit" button (i.e leaving the Linear Gradient screen), I can see the control effection.  

I am using Adobe Photoshop Lightroom 3.2.1

I just ran a test on the current versions of Lightroom Classic and Lightroom and do not see an issue. Perhaps sharing a screen capture will enable people to best address your issue.

best,\j

I’m not seeing a problem. Are you using Lightroom 3.2?

Try viewing the overlay after dragging the gradient. Tab two or three times with the O key to cycle and see the mask. Try using the exposure slider to test.