Why does Object Linking behave like this?

Question

Windows

Windows has OLE technology - Object Linking and Embedding. In particular, I'm interested in Linking.
We take some .bmp file, launch Wordpad, write “insert object” - link - from the file - specify .bmp. We edit (draw a dash) in Paint, draw a dash in Wordpad. And so after each action.
We do the same with .doc. Insert .doc into WordPad, edit (write text). Nifiga. Editing. Nifiga. And here we SAVE. And then bam - and all the changes appear in Wordpad. Not after every action.
After research, we managed to find out what should be saved when inserting Word, Wordpad or Photoshop. When you paste Paint or Excel - everything is updated after each action. How much is it, and how is it right? Is there some specification that specifies how to "according to the OLE standard"?