Cannot save data after using selection tool

Steps to reproduce:

1. Paste some image using ctrl+v.
2. Click anywhere outside of the image frame.
3. Save the file using ctrl+s. Expected behaviour: data to be saved correctly. Actual behaviour: selection data is lost. Environment details: Firefox 98 on Fedora Linux (fc35)

Notice: trying to follow operation history, after "deselection" step the image is cleared up blank.