Issues with inserting duct Solidworks Electrical 2D

When inserting ducts onto the 2d layout after resizing them and releasing the mouse they disappear and can only be found by holding- dragging mouse to select them, then you can see the move point and can move them, once mouse is released they disappear again.

This is not the case for any other component, all other components are visible.

Any help please.

Thanks Matt

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