You need more than 5 articles. So batch/copy some if you don't have.
Change setting Display # below list to 5. Click Submit. Just sometimes it works (depends on if a value is already written in session I think) and you'll see 5 items now.
Change setting now to a higher value. Click Submit. Page reloads. Doesn't work. Still 5 items. You cannot change value a second time.
Try now in other list views. Same issue. Just one change possible.
I'm preparing a fix based on the concept in phproberto@be06e36. That's the only real fix for this as it will prevent storing arrays & objects in the session for the same variables.
Confirmed
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