I have an issue, but I do not find the way to submit a support ticket, as your process is not at all intuitive.
Whenever I use the Undo function (Control + Z) it undoes all of the changes I have made in the last minute or two. If a segment has been confirmed it will undo the changes I have made but leave the segment as Translated. Obviously this can lead to some problems while reviewing or translating.
I do not even know those apps, and yes, it does not happen with other apps. I repeat, it is a Trados bug, it is obvious. Because it does not happen every time, but most of times.