A live tool run renders its rows inside a ticker — a window exactly one
line tall that offsets to the newest row. Expanding a row inside it left
the row's output clipped to that line, and the next call ticked it away
entirely.
Opening a row is a request to read it, so the run gives up the window
until it settles: the ticker unmounts and the rows render at full
height, the same escape an approval already had.
Brooklyn Nicholson
53e4f87017