Hey.
I once had the problem last year that while playing ff14 my complete keyboard and mouse setup would be changed. For example, I press the w-key on the keyboard and the character window would open. I noticed that my keyboard would also not respond normaly outside of ff14 like the webbrowser. After restarting or turning off and on the laptop, it went away.
Today the same thing happened to me again and it won't go away this time. I restarted my laptop 3 times and restarting ff14 3 times, always with some other settings. I tried borderless window mode and window mode, I tried with directX11 support on and off. I don't have any controller plugged into my laptop. I don't have the discord overlay on and neither do I have teamviewer installed. Every time I opened ff14 today, after 5 mins or so, my keyboard and mouse would change and I can't even type outside of ff14 normaly.
If it helps, I am using an omen from hp and using the keyboard on the laptop. My mouse is a G600 from Logitech.
I hope someone can help me fixing my problem.