Push-to-talk delay resets to 0,1 seconds

Hi everyone

I'm using Teamspeak 3 Update 3.0.18 (which to my knowledge is the latest) on a Windows 7 64-bit machine.
The problem is that I cannot raise the "Delay releasing push-to-talk" to more than 0,7 seconds without it resetting down to 0,1 seconds.

I play a lot of action oriented games that require a lot of focus from me and my teammates, and it's hard for me to keep pressing the push to talk through the whole sentence, and so I get a lot of clipped-off sentences which annoys me and my teammates.

Previously I've been able to put the delay to 1,5 seconds just fine, and there's been no update or any change to my knowledge that might've caused this problem. It only started under a week ago.

Do any of you have this problem or know how to fix it? It's a really big problem for me :(

(PST: Also whenever I hold my push-to-talk key, it mutes everyone else in my Teamspeak channel, is there a way to disable this?)

Thanks!

Push-to-talk delay resets to 0,1 seconds