Turning off Navigation Voice Alerts [13.31]

Haha, so I wasn't the only one who couldn't get the Nav. Voice alerts to work. Thanks for confirming that!

Seems like Garmin has big trouble with that function.

I have the same problem F8 51mm Amoled. The navigation voice cannot be turned off even when the off option is selected. With this setting, the navigation voice comes from the watch

So you mean the turn indication (alert) when doing preplaned routes? 
I had those 3 bieps alerts just one running a round trip navigation. But that seemed to be more an exception as it never worked like this anymore. 
There are no alerts at all possible for round trip navigation or direct to point navigations which is really sad.
For preplanned routes from the connect app or komoot the spoken voice alerts work fine when activated in the "more" menu before starting the route.
But I would also prefer only having the biebs for all kinds of navigation.

This is ridiculously funny (and annoying), I always get the 3 beeps (aka Alarm) but I can't get the navigation voice alarms to work in any activity. Although I turned every single setting on.

no I mean voice notification for pace or heart rate. before the update the watch vibrated 3x and beeped 3x. now 3x vibration 3x beeps and voice notification (pace, heart rate and the like) this voice notification cannot be turned off in any way. even when it is turned off it still sounds from the watch

I have the opposite problem. I can't turn off this voice notification, no matter what option I choose.

For me, voice prompts only work for routes prepared in Garmin Connect. In navigation-to-point mode or round trip mode, there are no voice prompts—only beeps and vibrations. Does anyone have voice prompts working in other modes?

At least you have those bieps... on my watch I had the bieps just one single time and on the next round trip navigation they went missing again. 
I also tried a full reset as I heard that it worked at least for some people but it changed nothing on my device.
Really believe that it is not an hardware issue on my end but I am thinking about asking for a replacement as this is at least something I can do. 

The operation of the signals is random. Sometimes it works, sometimes it doesn't. However, I found a way somewhere on the internet to make it work every time. You start a running activity, then start navigation on a previously planned course in Garmin Connect. You pause it and go back to the navigation start screen. Now, you select "Round Trip," and then the beep-beep works. Quite complicated, but the important thing is that it works.

youtu.be/GDVrzzobnfU