I assume “I didn’t search well enough” so apologize in advance for not finding this if it exists already…
On a clean vault with zero plugins, there’s something weird with the CSS that causes the right edge of the table to become impossible to view if the editor pane width isn’t taking up the whole screen. A scrollbar appears at the bottom, but you can’t slide it over any farther to the right- the
"|" edge boundary as well as the last couple of characters in the table row are not visible.
Here’s a screenshot from the Help vault, for example: