Another fix: Drag all comments (or posts) from left-to-right in an oscillating motion, and this seems to “unstuck” the vertical scrolling. I think what’s happening is that a given comment (or post) is getting stuck ~1 pixel off-center, so the app assumes you’re still focusing on the comment’s horizontal scroll pane (rather than the overall page’s vertical scroll pane).
Another fix: Drag all comments (or posts) from left-to-right in an oscillating motion, and this seems to “unstuck” the vertical scrolling. I think what’s happening is that a given comment (or post) is getting stuck ~1 pixel off-center, so the app assumes you’re still focusing on the comment’s horizontal scroll pane (rather than the overall page’s vertical scroll pane).