I can confirm that this definitely does happen for me and for my tribemate. If you fly just slightly north of the redwoods over the water, the pet finder will work (even for pets in the redwood area), but it will not work once you go back south into the redwoods agaain.

TheCenter is not available in the devkit, so modders cannot do anything. I've also heard that a lot of mods are not working in its new redwood area, but the rest of the map is fine.
There's no choice but to be patient and wait for the map author to patch it, it's probably the issue of map boundaries not being expanded.

thanks
:)