If displayInNavigation() is set to return false and would otherwise be the first Resource to be displayed in the admin sidebar nav, the ->title('Resources") type grouping never happens so all the Resources get grouped in with whatever grouping came before it.
There is another issue where Resources will have a random sort order in the nav depending on when they were added. Different servers can result in different sort orders. I suggest that the Resources sort order in nav defaults to alphabetical.
If displayInNavigation() is set to return false and would otherwise be the first Resource to be displayed in the admin sidebar nav, the ->title('Resources") type grouping never happens so all the Resources get grouped in with whatever grouping came before it.
There is another issue where Resources will have a random sort order in the nav depending on when they were added. Different servers can result in different sort orders. I suggest that the Resources sort order in nav defaults to alphabetical.