I use the CSS code below to make the comments scrollable

#wpdcom .wpd-thread-list {
    height: 250px;
    overflow-y: scroll;
}

But the filter button "Hottest Comment Threads" and the "Most Reacted Comments" will have positioning problem to located the comment, I was wondering if there was a way to fix it

My English is not very good, I hope I have explained the issue clearly, Thanks for help