Hi Rene,
I don't have fonts on my server, and I do not control some of the web apps deployed which all point to the same web map. We'll remove tahoma from the web map and I'll mark this post as answered (though extended to all feature services not just hosted), but again, it would be nice if Pro would block maps from being published with unsupported font types.
Thanks for taking the time to reply.
Cheers,
Jose