the mod ItemPhysic Full has a feature which makes the player capable of picking up items from the ground only if they right-click them or when you crouch near them.
i've noticed while playing embers with that feature enabled that most items that you acquire by right clicking a "storage" block, the exchange tablet for example, always drop onto the ground right beneath my feet instead of being placed into my inventory. sounds like an oversight to me, not gonna lie

Spawing an item at the players position is a pretty common way of putting an item in the inventory by mods. It's to be expected that things could break if a mod changes how a vanilla thing works, like how item entities work.