Only the Desktop icon (icon: fa://desktop) is aligned to the center, but the other icons (png files) are aligned to the left. Note that the height and width of png files are the same.
Looking at this more it looks to center correctly when the screen is below a threshold but switches to a left alignment like you are saying when beyond that threshold.
The bug looks to be related to the use of text-center which should have centered those images but obviously is not working passed the first box.
Using an mx-auto on the img tag does fix this. The view which is handling this is here I believe: