- View a board with a column taller than the screen (has a scrollbar).
- Drag a card to near the bottom position.
- Move the mouse down a little bit at a time, continuing toward the bottom of the page.
- Before patch: at some point, UI flips out and starts rapidly adding, scrolling, and removing the ghost.
- After patch: sensible behavior, ghost is in bottom position for all cursor locations.
Also works for dragging to the top.
(This leaves us with a little less dead space for cancelling drags, but you've still got the left menu, anything offscreen, and the escape key, which seems fine.)