UI Node Configuration/Output Table Window Shrink to Unusable Size

I have encountered the same issue as described in KNIME Workflows Shrinking. For some reason, the node configuration windows, as well as the output table windows, shrink to a miniature size that prevents working, regardless of whether I use the classical UI or the modern UI (see the attached snapshot). I have only encountered this issue recently (using Ubuntu system). Please help me solve this issue.