Indented list items lose their formatting when you switch their list style more than once. (The first time you switch the list style, it works as expected; but if you switch it again, formatting is lost.)
To see this in action:
- Create a list that is two or more levels deep. You can use either list style.
- Select one or more items in the second level or deeper, and change the list style. (This works as expected.)
- Select THE SAME list items and switch back to the original list style. The formatting is lost.
This problem doesn’t occur with first-level items. With those, you can switch back and forth between list styles many times without ever losing formatting.