My students use the forum extensively to help each other, ask questions, etc ...
Often they take a screenshot of their issue to paint a clearer picture for the forum readers. In the editor of the person that creates the post, this screenshot image can be pasted. It is then visible to the poster. But when what is in the editor is actually submitted to be published on Moodle, these pasted images are lost.
Students only realise this after their classmates or teachers start posting questions such as "which screenshot are you reffering to?"
Either make the pasting of images in the forum text editor impossible, or generate a warning that pasted images are not automatically uploaded to Moodle and shall not be shown to others.