As I'm not an English speaker I had my message translated by DeepL. I hope
it will be clear :) .
I updated the driver (to 6.00.112) of my Logitech K270 keyboard and since then the Play/Pause key does not work anymore. A few months ago, having changed my audio software (I switched from MediaMonkey to Clementine 1.3.1, but long before doing this update), I thought it could be the software. Not having uninstalled MediaMonkey I sat with it. And the key works. So it comes from Clementine. I went to the shortcut settings but I can't customize the Play/Pause key (it's pre-set on Media Play).
It's not vital either, but I found it convenient to mute and reactivate the sound with this key.
Windows 10