@avatar We discussed some of these concerns in the thread Minor UI issue with DEVONthink To Go
As you mentioned it is possible to input text, but it is not retained immediately. It is a glitch because the data may reappear after a short period of time. @eboehnisch is aware of the issue and will fix. As you can see it is all part of a larger discussion of UI and features of DTTG.
From my perspective as a user, I can assure you that the DT development team is very responsive and takes all suggestions and comments of users seriously. Many of the great features and bug fixes that we now take for granted began as discussions on this forum.