Mouse not scrolling

Hello all! I am seeing a strange problem with Comodo Dragon Browser. The first tab that I open (the one that shows when it is started) will stop allowing the mouse scroll wheel to work. It will at times work for a few moments then stop. If I open a new tab the scroll works without a problem. I have verified that the scroll wheel works without issue in all other applications and a couple of other browsers to boot! The scroll will work if the pointer is moved to the scroll bar on the side of the page but not in the main section of the browser window, unless it is on another tab. Then it works fine. Has anyone seen this ??? Puzzeled since a search on this returns no results. Am I missing something here ? lol ;D