Black background in file window
Background of the file window is rendered black. It probably happens only for large files.
(4) After scrolling to the boundary between the black and normal blocks, clicking and/or moving the cursor results in weird effects (either "restoring" the black lines to normal state or "blacking" normal lines)
OS: Fedora 33 w/ GNOME 3.38.5
Meld: 3.21.0 (meld-3.21.0-5.fc33), text filters are off