I found a bug with Managed Locations.
Managed Locations on installation is creating a Default category that uses a parent_id of 0 and level 0. This should be parent_id 1 and level 1.
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With parent_id set to 0, this Default category appears on all other Components.
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So, if i create or edit another category on any component and choose this category "- No parent -" that appears at end of the list of Categories, that category is broken forever, because opening this broken category makes backend of Joomla crash.
This is a critical bug that brakes even the Assets table.
I had to correct Assets table by hand and change those values of parent_id and level to 1 so it can't happen again.
Please review this as it seems to me this is a critical bug.
Thanks