strongbox monsters have no effect to delirium loot?

does strongbox monsters have effect with delirium loot because i ran a dig map with 29% monster pack size,sextant with extra strongbox and they are corrupted,strongbox scarab,2 sacrifice fragment with map device mod that adds strongbox.and also my prophecy bountiful traps added more strongbox.but when i cleared the map with delirium untill boss cleared most of the mobs and almost all of the strongboxes and still i got only 2 delirium loot?only 4 and 2 delirium loot dropped so are the strongbox mobs dont add loot to the delirium?is this intended or am i missing something?i have drox spawn too so drox added some few more mobs and still the delirium loot was disappointing.map quant is 106%.did a /bug and took a screenshot just in case someone will loot into this.bug report reference number is 3,398,678,038