I don't know in which which version of android this has been added but it seems like a really frustrating feature.
Once I delete an icon on my home screen, every other icon gets rearranged automatically towards the left top corner.
This is problematic because some of my apps are placed in a way that is easy to access with right thumb.
This means that every time I remove something from my home screen I need to manually rearrange all the icons back to how they ware, and I can't seem to find a setting that would fix this.
Version of Android - 6.0.1
But the same thing was happening in 5+
The smartphone I'm using is Sony Xperia Z3 compact.
As to the launcher I'm not sure which one Sony uses.