When internet connection breaks TUX fails to save translations and shows the respective message:
Upon reconnecting I expect to have a "try again" button somewhere as messaging platforms usually have for instance.
In the reality I see no such thing and supposedly need to open each of the unit in the new tab to save each translation typed manually. The only thing that happens upon reopening failed to save unit is that the respective message in the list turns from yellow to grey:
The save translation button also remains inactive at the moment, perhaps it is it that can turn into a "try again":