For example I open app 'notes' and cannot type anything (with every keystroke a sound is played but nothing is written).
After that, the keyboard (Macbook 16 inch) even fails to register any pressed buttons. Also tried multiple versions of 6.0.x but they all fail to connect and show 'Connection was terminated unexpectedly. And also I cannot access a intranet http/https page. I tried Forticlient version 6.4 which seems to connect just fine (I get an IP in expected range), but ssh/ping does not work. Just installed macOS Big Sur and cannot get a connection with Fortinet firewall VPN anymore, while it did work with macOS Catalina. MacOS Big Sur Fortclient VPN IPSec issues