I reported this issue in previous versions, but I wanted to make sure you are aware that it still exists in 1.51.375185.1.

When you try to modify a Dreadnaught (formerly Huge) ship design, the screen does not show all of the items that are in the current design.  The Inventory panel on the right side shows that the ship is fully loaded, but the diagram in the middle just shows 1 component.  Why don't the rest of the components appear?

Here is a link to a save file if you want to see this yourself:

https://www.dropbox.com/s/aim4g9zccbkkhcd/Ship%20Designer%20Issue%20Under%201.51.375185.1.GC4Sav?dl=0

To replicate the issue, perform the following steps after loading the save file:

1. Open a shipyard (I use the Sthenelos Shipyard 1)
2. Click the "New Design" button
3. Click the "Edit Existing Design" button
4. If the "Dreadnaught 45" design is not selected, select it
5. You should see the issue
   1. If all of the components for the "Dreadnaught 45" ship design are visible do the following:
      1. Select the "Transport" design (it should only have one component)
      2. Exit the ship designer completely
      3. Start again at the first step 1 above

It seems that the number of components on the most recently selected ship design prior to opening the ship designer is impacting the number of components that are visible (i.e. if the previous ship design only had 1 component, that is all you will see the next time you try to modify a ship design).