Atlas gets reduced combo damage

Stumbled upon this by accident when doing some multidetonation tests. As it turns out, Atlas receives 24% less damage from biotic, tech and fire combos (didn't check cryo but why should it be an exception...). Didn't save much numbers but you can reproduce it. Other bosses seem to be fine, didn't check mooks.

...you probably knew this subconsciously since ever

edit: numbers.

Drell Adept vs Platinum Atlas

Starting shields:
27422
After Reave:
27044 (54 damage/s * 7 s = 378 damage = 27422 - 27044 – OK)
After Cluster Grenade:
24494 (3 shrapnels * 850 damage/shrapnel = 2550 damage = 27044 - 24494 – OK)
After Reave + Cluster Grenade:
19882 (24494 - 2550 * 4/3 - 378 - 250 * 4.3875 * 0.76 = 19882 – OK) // * 4/3 because of the biotic bonus to 1 shrapnel

Human Sentinel vs Platinum Atlas
Starting shields:
27422
After Warp:
27208 (27422 - 27208 = 214... cannot say why)
After Throw:
27143 (27208 - 27143 = 65 – how does Throw damage work again?)
After Warp+Throw:
25101 (27143 - 214 - 65 - 235 * 4.3875 * 1.5 * 1.5 * 0.76 = 25101 – OK) // 235 – base damage of a 5+6 combo