Really sorry about the reset bug!!
It seems like there's a bug when joining the server that causes it (not) to load your 'user data' which = 0 everything, the hot bar items are a separate data loading process so that's probably why you get a few items there.
Keep in-mind changing your character can also reset your data when you join a server.
I did notice you saved on the same file after the bug happend so unfortunately you might of lost your data, i'll make sure I fix this bug first thing,
Unfortunately Co-op/Multiplayer is really hard to debug and find/discover bugs for me cause the only way to do it, is to run two games & play on both at the same time lol.
Again very sorry about the annoying bug, and thank you very much for all the feedback and suggestions, much appreciated!
Looking forward to the next video, cheers!