Row of Loaders : Row size does not reset to 0 upon loaders being destroyed

i have a Row containing some loaders like this:
Row {
id: itemRow;
Loader

;
Loader

;
Loader

;
}

It seems that after I set a loader sourceComponent to undefined, itemRow's width and height does not reset to Zero. When I load a new component into it, it remains the previous size.
For that, I have to manually reset the size of loaders item before loading a new one into them!
Anyone having this problem?