Unindent in a numbered list that is under bulleted list gives NaN

Steps to reproduce

Create a numbered list under a bulleted list

- List item
  1. List item
  2. x

when cursor is at x, press SHIFT+TAB

Expected result

- List item
  1. List item
- x

Actual result

- List item
  1. List item
NaN. x

Environment

  • Operating system: macOS
  • Obsidian version: 0.7.3
  • Using custom CSS: no

Additional information

Will be fixed in v0.7.6.