Bug: 'My Watchlist' jumps over 'Plan to watch'

I cannot view my Plan to watch section of the Watchlists anymore. When I reach that section the page jumpes to a blue screen (on laptop) or to the far bottom of the page (on mobile). With the Laptop; depending if I scroll down or up, next it either goes to 'dropped' or 'completed'. The same happens when I try to go up from the  bottom of the page. (I own a Macbook Air and an iPhone)

I can't reach the Watchlist when I'm not logged in.  In Firefox it doesn't happen the exact same way but it still jumps around the page while I'm scrolling. For example if i'm at 'plan to watch' and scroll up, it jumps to the top of the 'completed' section. 

 Lapidar:

if i'm at 'plan to watch' and scroll up, it jumps to the top of the 'completed' section.

I have the same problem (Firefox) and it is quite annoying. When I scroll down and reach new section, the scrollbar resets and I appear at the top line of that section. While scrolling down, it is bearable, but scrolling up is annoying. Sometimes it jumps from "dropped" to "currently watching" too fast. It is also annoying when I want to sort any list. When I get too high, it suddenly jumps to the top row of the previous section and I am lost.

Finding dramas on the list with browser function "find" is also impossible, because it searches only in the active section. So if I am on "currently watching" (of All dramas & Films tab) and that item is on "plan to watch", this function is not able to find it.

But in Chromium there is no such problem - there is just one global scrollbar for all sections and scrolling up or down doesn't jump anywhere.