Here's a script that will set that mode, in case you'd like to use it. It prevents someone/malware from being able to use your key after you've unlocked it. For example if you hacked my computer and tried to use it to ssh to another machine you'd be unable because you'd need me to tap the key.

I'd suggest trying 'on' before 'fix', but then switching to 'fix' for the extra security it provides.

https://github.com/a-dma/yubitouch