Exec setUnitLoadout command causes replication error

It has strange behavior. When I use this command in vanilla (from dedic on not local unit) it has chance to fail about 30% and 70% success. But right now I am writing script for moded server (armstalker mod) and it has 100% chance to broke replication. I've notice strange dependency - if my loadout array has uniform it will cause replication fail and sync will stop (only reconnection helps)