[1.12.2, newest version,newest forge] I found this issue while trying hoppering items out of a chest on a conveyorbelt of immersive engineering. The coin of fortune on a pedestal puts items in the chest next to it but i was unable to pump them out (with a vanilla hopper). so it seems like the inventory is constantly updated or something like that?...this makes this item on a pedestal pretty useless. there is no crash nor a log so this is the only way i can provide some information. thanks for the great mod anyway!

I am pretty sure that what’s happening here is that hopper puts item on conveyor and as it is item entity fortune coin picks it up and puts it in chest. In 1.10 we have agreed with blu that entities that he puts on conveyor are marked with PreventRemoteMovement attribute and fortune coin still ignore these.
So my guess is that IE no longer marks entities with the attribute and thus your issue happens.

closing as there was no more info and it's very likely what was described above is the case so ingame block setup issue.