Sometimes, I am not able to scroll the timeline. This happens on some PAGES and sometimes even in regular timeline. Scrolling via clicking on the left-hand slider works. Scrolling by mousewheel or uo/down keyboard buttons not. If I disable the addon, I can scroll again. Problem exists since a few days.
Sidebar is viewable for a second after page reload and the disappears. The problem exists for a few days only. Current Chrome Version is 56.0.2924.87 (64-bit).