Microsoft Office Missing Filename in Title Bar

Hi,

I have a problem with all Microsoft Office 2019 apps on my computer where the filename is missing in the title bar. This issue only appeared a few days ago.
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If I resize the window vertically up to a certain point, the title bar will show the filename on the left.
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Has anyone encountered this before and is there a solution to fix this? It is quite frustrating not being able to identify the file being viewed if there are multiple windows open without the filename in the title bar. Hope someone can find a solution.

I got away from Office 2019 because of all the glitches.
However, try deleting then reloading Office.