Cannot open multiple PDF, close bookmars, or open Windows taskbar after upgrade to 19.021.20048
After applying the 19.021.20048 update, Reader has become completely useless for me. I cannot open PDFs properly, and it interferes with the Windows 10 taskbar.
If I open multiple PDFs, or if I open one and attempt to change the view by closing bookmarks or other toolbars, I am unable to scroll through documents. For example, when I first open a file I see this view:

However, if I close the bookmarks, this happens:

The document shifts to the left, but there is a large empty grey area on the right. In addition, I cannot scroll through the document, I can only see what was originally visible on the screen. When I scroll the scrollbar moves, but the view does not. This also immediately happens if I open multiple PDFs at one time.
Additionally, I hide the Windows taskbar. When I move the mouse to the bottom of the page the taskbar should be opened, but this no longer happens when Reader is open.
