Ribbon tab become disabled with no reason

Eli,

That doesn't sound possible unless for some reason you've hooked the tab up to a command and the command is unable to find a handler. When using commands on controls you need to always ensure keyboard focus is within a container where either it or an ancestor can handle the command, otherwise controls tied to commands will be disabled. This is general WPF design, not specific to our controls.

Anytime controls auto-disable is due to WPF commands and where your keyboard focus is. If you have a particular problem then please repro it in a very simple sample project and email that over so we can take a look. Thanks.