I am facing issue related to bullet indent/outdent which is as follows:
Video is attached for reference and it is producible on the new version 3.0.6; check the following link to produce it.
https://jsfiddle.net/4fb18s6m/1/
Items should move to previous position
Note that items do not move to previous/original position.
version 3.0.6
windows 10
chrome

Also having this issue, another way to reproduce is by indenting one list item using the indent button and another using the tab key.

From my understanding it looks like using the indent button is both creating a nested list and adding the indent margin (default 20px), whereas just using tab to indent does not add the indent margin.
I can confirm the behaviour described by drampelt.
In my opinion the attribute style="margin-left: 20px" should never be set on <li> elements.