I know some people said the middle stage lichen (spikes, but not the dark red one) had a bug where they dont drop loot. i havent found this true in most levels, but in the arena when they appear in the final set of enemies for the first stage of the arena, they dont drop anything. that sucks!
is this normal behavior? i think i have had the trojan knight not drop things before either, so maybe its normal. didnt want to report to bugs if it wasnt one.
If there's only a single core in a colony, it's not ready to be killed. It needs to be a cluster.