GNOME 3.28 does not save anywhere screenshots made by keyboard

[setonic]

I press right key combination - I see the "cross pointer" - I point the space on my desktop screen to be captured but after that nothing happens - it does not ask me where to save and do not save anywhere by itself (nothing in Pictures folder as well).

Any ideas?

[Dennis N]

Hold down left mouse button and drag the cross to make a rectangle of the screenshot area. Release the button, and the screenshot is made and stored in Pictures.

[setonic]

Dennis, thank you for advice - looks like you are sure that I am an idiot. Yesterday I did everythibg the same and did not save screenshots, today I've made a screenshoot and it did save in Pictures, but obly first screenshot, all next screenshots were not saved. I reboted my desktop and it start work again - saves screenshots in Pictires.

I have no idea what it works this way.