numAdditionalRows only pads the bottom of the container

[furlongce]

When utilizing the numAdditionalRows parameter, the scrolling experience is dramatically improved as long as the user is scrolling downward.

Unfortunately, it only pads the bottom of the container and not the top. So when scrolling up, the experience is much worse.

It should be updated to pad both, or an additional parameter should be included to specify how many rows you want to render above the container.