New dungeons seems to fail to spawn, vanilla dungeons can only spawn and no Quark loot can be found nevermind, seems to be rare

Attached a screenshot with world seed and coordinates at a normal dungeon, the world generation type is Default

Same as before but with World type Realistic

There's one in the same seed at 265 51 677. The vanilla ones just aren't always removed.

The custom dungeons aren't spawning for me, either; I'm only getting the vanilla dungeons. I originally had several mods installed, including Biomes O Plenty, but I'm still getting this issue after removing all but Quark (and AutoRegLib) and creating a new world.

I am using the following:
Forge 1.11.2-13.20.0.2228
Quark 1.2-90
AutoRegLib 1.1-4

Here's a screenshot of some of the dungeons. I've found several, and all of them use the vanilla design. This is at approximately -400, 30, 150:

(screenshot: http://i.imgur.com/D4lDVfI.png)

My seed is -6113417105961974832. It was a "Custom" world generation type, but I'm pretty sure the only change I made was increasing the "Dungeon Count" to 100.

Quark config file: https://pastebin.com/kRurEXJP
FML log: https://pastebin.com/UNjyWYwB
Probably irrelevant, but my OS is Ubuntu 16.04.2