One of our clients sent me the message below concerning the ATTO editor:
Below a short description of the Atto Editor bug which is persistent in our MWP version 3.10.6. Atto Editor is inserting a span style attribute when hitting backspace. Which is highly annoying when editing copy.

1. Copy clean text from Notepad to Atto Editor
2. HTML show clean in Atto Editor
3. Insert cursor at start of a paragraph and hit backspace
4. Atto Editor inserts a span style attribute with additional styling

See attached screen dumps for details. If you could escalate this with Moodle PTY Ltd that would be great!

Issue was originally found in Moodle Workplace. After reporting it on the PAG forum, issue created here