When i put Items into the multi-smelter it gives this error in my server https://pastebin.com/4QADfC9e
and it also adds a huge delay when manually grabbing items out of the AE2 network.
The issue doesnt seem to happen if items are inputted 16 at a time.
none of the mod config files have been changed from the original

Known problem with Omni's version of GTCE, Exa's fixes fix that(see discord). The error thing, that is - the AE2 delay is probably unrelated.

Issue resides in GTCE. It is fixed already in a newer version than the pack uses, which we will be updating to.