Im not sure if this is a bug but I find it very weird. I called in a hefty amount of imperial trader caravans and they NEVER sell psycasts. The imperial traders ships also dont sell any.
I find it weird since they sell them in their bases if you go visit them, and also you would think that if anyone sold a psycast it would be them.
Do you mean they never sell psycast amplifiers or psycast abilities? Just need that quick clarification.
Since he mention base (settlement) i think abilities, since amplifiers are only from title (at last from the empire) or quests (rebels).
I confirmed the psycast abilities not being sold. I'll assume that is what is being meant. Bug reported.
It's as intended; some items require player to actually caravan and buy them instead of just sitting in base.