Summary:
The last line of the text in the update log is not shown / appears and disappears while scrolling with the mouse.

Repro:
1) Select the 11/11 update on the updates tab
2) Start scrolling down using the mouse

Result:
The missing last line of the text appears. (Also disappears if you start scrolling up using the mouse.)

Expected:
The last line should always be visible.

Update log with the last line missing
Scrolled down, the line automagically appears