I was going in and out of a factorismo3 factory and noticed that the favorites look blank but are still functional

I'd describe how to recreate the bug but tbh I've only been using the mod for a few hours and then noticed they were blank.

I do think it's going in and out of a factory that causes it. but also, if you are in nauvis and you have the bug where the toolbar icons are gone, I found that to fix it, all you need to do is go into map view, on left, select factory floor, then quit out of that and the icons will show up again

I noticed a similar but different bug related to the favorites icons. Possibly related?

If you delete a favorite, the icon stays until the next time it refreshes (like move a hotkey or something). It's not functional, but the icon is there.

DoomSquirter: I will look into why the fave bar is not refreshing after a enter/exit into a factorismo factory - stay tuned. I don't use factorismo normally, so it may take a bit to get up to speed. This sounds like it might be a factorismo issue where it is not refreshing the UI after enter/exit

Zaanzabar: I think you are deleting with vanilla map tag modal. There is something wrong in that the favorites are not being updated after a delete from that modal and I will work on it and get back to you. In the meantime, instead of doing a left click on the tag to open the modal, use a right-click to open this mod's tag editor modal (you will see the diff because the favorite button appears) and the correct actions should follow.

Thank you both for reporting these issues.

The proposed fix is here: https://github.com/KzFactorios/TeleportFavorites/releases/tag/v0.0.95
I will be testing for a few more days before I release.