List of steps to reproduce (step by step, including full links if applicable):

• Open an existing or a new wiki page with the VisualEditor
• Create a new unordered list by clicking on the corresponding icon in the toolbar and create several items by typing some text, pressing Enter, typing some text, pressing Enter etc.
• Save the page and observe that there is a whitespace in the source code between the asterisk and the text:

• Open the same page again in the VisualEditor
• Place the cursor at the end of the first item and create a new list entry by pressing Enter and adding some text
• Create another list item by pressing enter and typing some text
• Save the page

What happens?:

No whitespace is added between the asterisk and the list items for the newly added items, i.e., the items that were added to an already existing list

What should have happened instead?:

The VisualEditor should always add a whitespace between the asterisk and the text in the list, as it does when creating a new unordered list:

Further notes

This error occurs frequently (example). It was mentioned along with T50463, T54240, and T247241 as one of the most annoying VE bugs that have to be cleaned up through user scripts in the Technical Wishes pre-survey on the German-language Wikipedia.