TYPO3 Core

When you do the following basic action in Typo3 7.6 LTS you lost your "Plain Image Reference".

1. Add Content-Element type "Text" to a page (Regular Text Element)
2. In RTE-Editor add Text and a Image "New Plain Image" from fileadmin => Save and close the Text Element ("fileadmin/folder1/file")
3. Go to Filelist: Cut the Image add (from Step 2 - now it's in the clipboard)
4. Go to another Folder ("folder2") and click "Paste in clipboard content" (everything looks fine, the file is now in "folder2" and when you click "Info" the Reference to the "Text" Content-Element is listed)
5. Click "WEB=>Page", open your Text-Content-Element (from Step 1) click RTE: "Togle text mode" => you see img with "src=fileadmin/folder1/file" (not "folder2")
6. When you now make the error and save the "Content Element" you destroy your page-design, because the image lost the originally dimensions (for example 100x100) and you lost "plain image". It's now a "magic image" with "src="fileadmin/_processed_/...." and with wrong dimensions

I checked this with 3 different Typo3 Installations (7.6.10) - The bug is everywhere.
It's the same bug with "magic image" => you lost the originally img-dimensions.
When you moved a big folder with images (in Step 3 & 4) - all the Text-Content Elements with referenced images are "destroyed".