WowAce

No Lua errors so this is a logic / implementation error somewhere.

The relevant settings are:

I will add that the filtering tab has every raid size from 5 to 40 checked both for Boss and Boss Targets unit groups.

Workaround is adding party + solo to filtering tab.

For some reason all the raid options are not enough.

I didn't try just adding party or just adding solo but hey at least there's a way to make them work so.

TL;DR: If Pitbull boss frames are not showing up despite having everything configured correctly go into Groups > Boss (if you've made one) > Filtering Tab and check every single box.