- Let's set PgUp/PgDown for for keyboard shortcur "PageUp (Browser)"/"PageDown (Browser)".
- Place focus in News or Feeds or even Browser (!!!) panel.
- Press PgUp/Pg Dn.
Generally - when a key with some general meaning (Up/Down, PgUp/PgDn etc.) is pressed, please be sure to firstly interpret it according the setting for keyboard shortcuts setting and if nothing is found in this setings, use the general meaning of the pressed key.
I could repeat, I will try to fix it.