Attention: the newly added “mechanic” to spawn the lootorbs from heros and bosses is not working as intended for multiplayer sessions and is introducing alot of new issues…xD it will be reverted to the old state in the next update. furthermore we noticed various things not dropping (anymore=?) for either the host or the client, and the SR extra reward Orb doesn’t seem to work anymore at all in coop, all this will be investigated! sorry if anyone experienced some issues due to that. The next update will be available at the start of next week i think.
Cheers.
EDIT1: anyone who is interested in some changes to fix coop issues can take a look at this version which we are playing atm to get rid of some (or maybe all? XD), feel free to contribute ;D
EDIT2: we’re getting there XD updated file-link again for those who are interested as usual 
it’s initial problem with coop and functions not working was/is the scriptfunction to spawn, which has been adjusted for mp now ;D some stuff already working in coop, very happy
EDIT3: testings and adjustments will take a “bit” longer then initially thought, more things working in coop, mostly unfortunatly only when the host takes the primary action on it → like Grim Souls, Bookworm Buff etc. Shattering Essences as reward are intest with a reward trove to get them, which also works, but only when host opens it. I am unsure if i can change this behavior 
at least it is working a bit better now 
what also will be further optimized atm are the hero archetypes, better how they are spawned. intest is a new mechanic to open a small portal for each archetype to spawn the addons from that petspawner, which seems to work pretty much alot better in terms of control over it and the performance it drains ;D adapted it from the spawnmechanic Diablo himself already has in phase 2 for spawning his shadows, looks also better overall Anyway, an update will be available a bit later, i will update the MPtesters.zip file from time to time until a real udate will hit, i can’t tell you when this is but at least 1 week more testings and adjustments it will be for to make it worth it to call it an update.