Can't maximize word 365 files after being minimized to the taskbar

When I minimize multiple word 365 files to the taskbar and then try to maximize again, I can't. If I click on word or hover the mouse over it on the taskbar, it shows the multiple files briefly and minimizes itself again. I configured the Word executable to maximize without success. If there is only 1 file open that is minimized, I can maximize it with no problem. I can also bring up the file by doing alt-tab.

Any thoughts?