Splitting in chunks doesn't work with saved workspaces (4333789)

Splitting in chunks doesn't work with saved workspaces

Opening a saved workspace with an editor window containing a file splitted in chunks. The chunks are incorrectly splitted in the different tabs. Further editing and saving of will replicate the chunks on the saved file.

1) Open editor window
2) Open a file splitted with chunks (use file attached as example)
3) Save workspace
4) Restart Toad (or load default workspace)
5) Load workspace saved in step 3)
7) The file is loaded in tabs, but not splitted correctly.You will see the complete file is in each tab
8) Save the file with another name or modify and save the one we have : the resultant file has the code duplicated