maps do not drop with Idol Mod "Final map boss has #% chance to drop an additional connected map

I have run 12 desert springs with 32% chance to drop a connected map on my idols combined, as well as destructive play. From the 40+ map bosses slain, no connected maps have dropped from any bosses or other map monsters.

Edit: I have now run around 50 maps with this setup, and while the idol mod does work on the native map boss, it does not apply correctly to the bosses generated by Destructive play. Based on the wording of the mods, it should.