cellHeight: "1vw" causes items to move during resize

[jpleau]

It looks like whenever we try to resize a grid-item, it moves up or down. The distance depends on how far from the top we are.

Example:

https://jsfiddle.net/k52y8gxv/

Scroll down to see the bottom-right grid item, try to resize it, it will move while we're resizing. Not sure what decides if it's moving up or down. The interesting part is that if you move it up, the distance it will try to move will be reduced, and if you move it down, the distance will be increased.

I tested this with 7.0.1 and 7.2.3, also tried with older versions that were using the jquery D&D.

[adumesny]

setting an explicit height in px works - something about cellHeight: "1vw" is causing some issues...
https://jsfiddle.net/adumesny/vzdtbLy6/

low priority.