I was finally able to get around the rendering problems for adjacent rows in the LazyVerticalGrid (which I filed as a bug). White lines were introduced between the rows on the right side of the grid. This problem is due to a floating point and fractional pixel rendering issue.
I got around it by creating a Canvas version of the plate grid and handling all the painting and events for the wells manually. The white lines are gone, and I was able to create better responsive design behavior.