A problem with saving task's names after changing focus (Linux)

[SiekamCebule]

• When you click "enter" or click wherever on screen (except text field widgets), the task's name is saved
• But when you select other TextField (to change name of other task), the name of previous task is lost (if you hadn't done anything described in aforementioned sentence)
• The name isn't lost entirely, but there it remains only one (first) letter of task's name