It has been reported and we are investigating.
Having spent some time using RB today, I'm wondering if the odd behaviour of the vertical scroll bar in the My Flights list is related to this. Scroll bars are controlled by the container view entries, the position and size being calculated automatically. At present the scroll bar is centred and small even when the container is not full of entries, that should make the scroll bar fill the edge of the container.
Another possibly related thing is that earlier I followed an A3ST from Hawarden to Toulouse with auto map panning enabled. Now I am trying to do the same with an A380. The network flights filter has one A380 in it, but the highlighted aircraft on the map keeps unhighlighting and it now keeps returning to F-GSTB which is an A300 Super Transporter. If I double click the SIA A380 the map moves to it and then a short while later moves back to the A3ST.
This behaviour is clearly wrong, but it seems to be because RB is trying to hold on to old data instead of moving to new data.