I went to the Display tab and went to the display that was causing the issues

Then, I discovered the steps that fixed the issue for me. When disabling the monitor in my software with the cables still attached, the issue was also gone.

In other words, it looks like the combination of the drivers and that specific display was causing the issue for me. When taking the HDMI-cable out of my main monitor and plugging it into the second monitor so it was connected again, but with a different connection type, the issue came back. I then started experimenting with my displays and discovered that when I would disconnect my second monitor that was connected via DVI, the issue was gone. I was on 18.5.1 first and updated to 18.8.1 to see if the issue was fixed, but it wasn't. My main monitor is connected via HDMI, my second monitor via DVI, and my third via VGA -> DisplayPort. I finally found a solution that fixed it for me!! Kudos to this user for finding a solution. Turning off the HDCP Override switch in settings>display>specs>override resolves the aggravating stutter and lag many of us are experiencing over the past few months and since the 18.5.1 release. This was posted by WICKEX in another thread. I wanted to create a new thread since the following fix for mouse lag that many are suffering from after new releases of Radeon:

Software lag switch reddit