Shapes resized after pasting

I have a macro that selects an array of shapes, copies them and then pastes them in another sheet.

The source of the shapes varies but I always take care of removing properties like "move and resize".

Something that is happening lately is that some of the shapes get pasted and reshaped on one axis. More precisely it gets scaled to 1%. This doesn't affect all the shapes of the array.

Does anyone has a clue on this bug? Thanks!