WowAce

Trying to hide anything not in current zone makes anything disappear that is not showing a zone on the minimap icon, however in the tooltip and options the zone is listed correctly.

Not sure I understand this correctly. Is the problem that items are filtered incorrectly or that there are no entries?

In both cases, I can't reproduce the problem. Are there any Lua/script errors? See https://www.wowace.com/projects/rarity/pages/faq/how-to-enable-and-disable-script-errors-lua-errors

In the first screenshot you can see for the 'reins of a tamed bloodfester', the zone is missing from the list on the right (when you hover over the minimap when showing all items and not hiding out of zone items), but the zone IS listed in the options for the mount, as well as when you hover over it. This makes it not show up when you are in Nazmir, and have the option 'hide items not in your zone' enabled.

No LUA Errors were thrown for rarity.

Here is the minimap icon in Nazmir when moused over when the option for hiding items not in current zone is enabled.

Ah, now I see what you mean. If there's no zone entry in the tooltip, Rarity doesn't have any data for this item and that's why it's considered "not in your current zone". The text displayed elsewhere is actually from Blizzard's mount journal and not something Rarity can use for the zone detection, as it's purely descriptive.

That said, adding the correct zones for the BOE mounts is easily done, and I've added it to the latest alpha.

thanks!