When ticking (turning on) "prefix netsted numbers" in an "Enumerate" list, all items are prefixed by the symbol of the last list

If the last list ended with "5.", then all items will start with it: "5.1, 5.2, 5.3.1, 5.3.2, ..."
If the last list had bullets, then all items will have a bullet prefix": "*.1, .2, .3.1, *.3.2, ..."

Aside from the bug described, I wish that all commands would be saved in the "undo" buffer. Currently, ticking the "prefix nested numbers" and then trying to undo it results in undoing the last edit, and not undoing the "prefix nested numbers"