When comparing three files, window is wider than display and can't be resized

I've just run into this problem on Fedora 33, meld-3.21.0-5.fc33.rpm. It's on a high-DPI display. The window is too wide, and the width can't be reduced by dragging the window border. Shrinking the font for file contents did not affect the window size or the ability to resize it. This is probably not the previously reported problem where the file names are too long and don't get ellipsized. It may be that the controls at the bottom of each file panel are collectively too wide.