Visitor Log shows high number of entries, instead of 20

Since upgrading to 2.3.0 my Visitor Log takes ages to load, because it shows a lot of entries, maybe 1000?

It used to be 20, with a drop down menu at the bottom to choose a higher number, but now this menu is gone.

How can I fix this?

In the footer, you can “expand the menu” by clicking on the icon that shows when you hover over the footer.
then you can change back to showing on ly 20 rows (not sure why it’s changed to 1000, it shouldn’t have…)

I think it is counting a unique visitor more than one time