It's impossible to drag the right handle of a randomization slider. When trying to drag the right handle, the left handle is selected. Once the user moves the left handle, they can move the right handle.

*Repro*
# Launch Unity
# Create a new ARC asset
# Open the new ARC
# Click on the volume randomization toggle to enable randomization
# Drag the right handle of the randomization slider to change the volume max randomization value

Expected: The right handle moves

Actual: The right handle stays still but the left handle is selected instead

*Note*
* This only happens when you first open the ARC window. Once you get the right handle to move the first time, subsequent attempts work fine until you close the window and reopen it again.
* Also, if you resize the window, it won't reproduce.