Interactive Book: Text being added
When creating an interactive book (issue was also reprocued with a True/False Question, Multiple Choice Question and Quiz), a long block of text is added to every textbox once the activity is saved. This includes text boxes, True/False questions, and the activity description page. When returning to the edit page the text can be deleted, but reappears upon saving the activity. This happened whether the text was typed directly into H5P or was copy-pasted from an external editor.
Issue was reproduced using Google Chrome and Firefox.