When selecting things in the RoboHelp editor, it's helpful to understand that something like an image that may be part of the selection isn't really the image. It includes the HTML code behind whatever is selected. I would surmise this is totally expected behavior and quite by design.
I suppose if anything, what you are looking for would be something new that would offer an option to copy only the selected text and ignore the HTML code.
One workaround might involve sidetripping the copied text by copying the text, then pasting into Windows Notepad. That action should strip away the underlying HTML code. Then select the text from Notepad and paste elsewhere.
You might also be able to achieve the same thing by previewing the topic and making the selection from the preview.
I found out more:
This is browser specific to IE. It copies regular and hidden text. If Word is set in Display to "Shown all formatting marks" or if "Hidden Text" is enabled, then cutting and pasting a glossary "pop up" will show the hidden definition text. All the user has to do is in Word go to File, Options, Display and turn either of these off, certainly make sure "Hidden Text" is disabled.
Using Firefox and Chrome, this does not happen
Happy to help but I'm not clear on the problem. Who is copying and who is pasting and where (what app)?
Whether or not expanded text and dropdown text is included in printed documentation is a setting in the Printed Documentation layout.
Send me something offline if you wish.
See www.grainge.org for RoboHelp and Authoring tips