Following the very popular new update of Customise your own vessel status icons (e.g. Chilling & Carbonated), we have added the option for you to control when each status can be used. This allows you to have statuses that can only be used when the vessel is filled, only when empty, or can always be used. Simply go to where you manage your vessel statuses and update the status settings to take advantage of this.

This was another great community suggestion: Allow updating vessel statuses when the vessel is empty. Thanks for helping us to make Breww even better!