Tables displayed in Qt Creator don't have a table border

When you view help content with a table in them, the border is gone. Why is that? (Screenshot attached) Instead, it should look like this: https://doc-snapshots.qt.io/qtapplicationmanager/configuration.html#

In content, the whole point of using a table is to get the table border. Otherwise I would use a list. I have a lot of tables, painstakingly arranged and organised, only to have Creator remove the borders.