Empty space generated under Sliders in Interact

I’ve noticed that a lot of unnecessary white space is generated under sliders when using a flexible layout. Any idea how to get rid of this?
Here is a MWE showing the issue:

using Interact
S1 = slider(1:1:10)
T = repmat([S1],10)
display("text/html", "<style>.cell .widget-area .widget-subarea { flex-direction: row; flex-wrap: wrap;}</style>")