When the game isn't running all the parts appear to have welds and studs

So when I go into edit mode on my game, all the parts have welds on them. And the baseplate has studs on it, when when I play the game. All of them go away and it appears normal. Not sure what is causing this. This doesn’t happen at my other places. It doesn’t bother me at all, just curious why it happens.
And here is a gif:

The weld/stud/glue surface type only appears on parts with a non plastic material while in edit, they don’t display in solo/client.

Why is that though?