Bulleted & Numbered List are not visible, when inline editing existing content

Your software
My Mautic version is: 4.4.5 (this issue is present also in 4.4.3)

Your problem
My problem is:
Landing Page Builder (same happens to Email Builder)
For inline editing already loaded text blocks, toolbar does not contain Bulleted & Numbered List. Only after adding a new text block, these options are available, only for new text.

Also, if trying to inline edit a bulleted list (after closing and re-opening the builder) the toolbar is not displayed anymore → console displays this error “Error: The specified element mode is not supported on element: “li”.”

I appreciate any hint on how to solve this issue, including changing the code.
Thank you.