Bugs appear online in official multiplayer
Xbox bugs appear in online multiplayer on official servers
Space engineers - base game
Sparks of the future pack
Weapon rack shows unlocked for warfare dlc but warning states is part of decorative block dlc.
Industrial cockpit can be placed without dlc, simply scroll to where the cockpit is on the menu and hit RB to bring up placement, can not be attached to a structure but can build free in space and then build onto it.
Attached are two video files, i think they can be access online if you prefer from:
Weapon rack incorrect dlc list (bit of a wait at the start of video (xbox recording)
Additional with thoughts
Game hard crashes xbox when cache change over gets to high, pasting and deleting multiple large blueprints that stretch the pcu limit then changing to multiplayer without closing the game causes a hard crash of the xbox. Probably try auto clearing the games xbox temp files when you click logout on the game menu.
This issue also causes a server block (doesnt appear in normal listing despite being active) most likely the anti cheat or whatever getting spam messages from the connection due to over sized cache/temps and locking you out, only way to recover the server listing is to reset the xbox mac address then hard reset.