When the task is selected in widget, then competed mark is set and home button pressed, the complete mark state is not saved. One should press "back" button in top left corner first. Which is very inconvenient niether logical.
IOS, iPhone 8 plus
Thank you very much for your feedback, @titovmaxim!
Do you mean you hope to click the completed check in Widget to just put the task into Completed list? If so, the feature has been added in the new test version, which is to be released soon as Version 5.9.
Have a happy new year!