Hello @weedor,
Thanks for the report.
Indeed, I have been troubled at times when using the Grid Editor with smaller height values that made using it quite difficult.
While we wanted to keep the Grid Editor as close as possible to the real columns block, it seems that this specific property just confuses and makes things harder.
So we’ve decided to remove dynamic sizing inside the Grid Editor in version 1.2.
Please let me know if this helps on your side.
Thanks for taking the time!