I switched from Office 2016 to 2019 via Office 365 subscription. Since then, my spreadsheet does not accept any keyboard inputs after I use the shortcut in Excel to change either font color (alt-h-fc) or fill color (alt-h-h). The only way for me to reset it is to click on the spreadsheet with my mouse.
I did the same upgrade on my laptop (that one is Windows 10 Home though, not Pro), and I do not have the issue there.
1. As I am performing the shortcut to select a font color
2. After I press enter to select a font color, I am now unable to move with keyboard. Even when I press escape, random letters, etc., nothing happens.
If I click the spreadsheet with my mouse, everything goes back to normal. Also, notice how the "m" from the shortcut font color menu is still present for some reason.
*This also happens when I use the shortcut for the fill color
I'm having the same issue. I've been on with Microsoft support for almost a day now, and nothing seems to fix it. We changed settings, rolled back updates, uninstalled and reinstalled office. Nothing helps.