I've found a solution for this that worked for me
The bug is in Cortana, so you need to switch it off
Go to "Cortana & Search Settings"
Turn off all three settings:
- "Let Cortana respond to Hey Cortana" to "Off"
- "Let Cortana listen for my commands when I press the Windows Logo Key" to "Off"
- "Use Cortana even when my device is locked" to "Off"
Then restart the PC
I think that you need all the Cortana settings off, because turning off just some didn't make a difference