Infobox is overlapped by Contents box when pages containing them are exported as PDF

When in the same line as the Contents box there is an infobox, the latter is overlapped by the Contents box.

While the page is in View mode and I shorten the browser page width, the infobox maintains its position, thus no overlapping is happening in this situation.

Currently I only tested with a Simple Page template, but I also noticed that the Article, Encyclopedia, Meeting notes page templates include the Contents box and I suspect it could reproduce with those page types as well.