Davinci Resolve Nodes don't show Picture Preview

Hello,
Well the title kind of says it all its a bit frustrating. IDK what it is. It just shows a circular arrow with a grey background. The only one with a picture preview is the very first node. All the others i make do not display picture.
Example:

Well the title kind of says it all its a bit frustrating. IDK what it is. It just shows a circular arrow with a grey background. The only one with a picture preview is the very first node. All the others i make do not display picture.
Example:
