## Subject of the issue Updating element heights with cellHeight() causes all elements in grid to overlay over each other on first row. ## Your environment * Gridstack v3.1.4 (HTML5) * Firefox 84.0.2 AND Chrome 89.0.4384 dev (arm64) ## Steps to reproduce Reproducible by updating cell height with cellHeight() on any of the provided demos. ## Expected behavior Cell Heights on grid should adjust based on parameters in cellHeight() ## Actual behavior Elements from multiple rows collapse into the top row and are all overlayed/stacked on top of each other.