Why can't I see open documents in the taskbar in Excel 2010?

Question

Task bar

several
windows 8, office 2010 and start8 computers, one does not have start8
and almost all have
the same thing in excel settings, there is a checkbox "show all windows in the taskbar" and, accordingly, when you open excel documents in the taskbar, these documents are visible, depending on the setting, they are either grouped or shown separately,
but at some point, some documents are no longer displayed in the taskbar, to switch to them, you need to open the "view" in excel and select "go to another window", after that documents may or may not start showing up again,
sometimes it helps if you uncheck "show all windows in the taskbar", click "ok" and then put it again, but sometimes it doesn't help, sometimes disabling grouping helps, sometimes it doesn't, I can't find anything similar on the Internet, I get the impression that of all the millions of users of office 2010 and windows 8, only I have this glitch, but what am I doing wrong? how to win it?

Answer 1

did not find a solution from office 2010, switched to office 2013, no such behavior was noticed there

Answer 2

Apparently because Windows "2010". If you can't buy a license, download at least the official builds.