I just noticed a bug, that if you throw Items on an abstruse platform, other players can't pick those items up. I, myself, can. I don't know if it is a bug within Botania or the Modpack (FTB Mage Quest), but I post it here, because of the abstruse platform. I use edition 201.

I hope it helped, I'm sorry for my english.

I have noticed this as well, intermittently. I thought maybe the item didn't know if it was supposed to be on top of the block or not.

Are items supposed to go through spectral (dreamwood) platform? they aren't for me and I think this is related