Challenge event bonus has been updated to include the “new” families…but once again the slayers were left out. Gargoyles also weren’t included which is odd but doesn’t look like a bug yet.
Also appears to be some visual issues with the bonus appearing over the heroes’s class indicator on the roster (all below image except Shrubbear)
But as you see in his picture, the villains (Edd) do get the bonus. I can verify that Starfall Circus heroes get the bonus. And it says in the text that all 8 challenge festival event families (+ the new bards) should be getting the bonus, even though Slayers, Villains, Starfall and Bards are not involved here.