i finally realized
why people complain, it's because the Like button is always on top even if the main window height is too small and it creates the 'scroll down/up' phenomen
i not noticed it as my window height is double of normal height (really great we can resize the whole avast control UI window)
yeah this is definitely bad, the Like button should in case of 'not enough height' become equal to the rest of left buttons and be visible only when scrolled down
ofcourse the option to disable it in next update is very nice bonus