Subject of the issue

you can drag out to remove) from every side but bottom even though you have maxRow=6 (you can see drop feedback stays inside in that case)

Your environment

gridstack v3.1.3 with gridstack-jq-js and gristack.min.css as only references.
Chrome v87.0.4280.141 (Official Build) (64-bit)

Steps to reproduce

https://jsfiddle.net/adumesny/ks8gmqo4/

Expected behavior

Should remove item when dragged out from bottom of grid (as it does with every other side)

Actual behavior

Extends browser window and upon drop, goes back to spot where picked up.