/gamerule keep inventory true ---> false

please provide exact command used

The rule is keepInventory and not keep inventory

/gamerule keepInventory true (and also false) and /gamerule mobGriefing false  do not seem to be registering in the new update. Both give warnings that command is not found. https://aka.ms/snapshotbugs?ref=game Have those rules changed? If these options could be put into the main world generation selections It would help. Especially new players that don't know about that option. It makes playing a lot more fun and less stressful.

It's /gamerule keepInventory true. Arguments are separated by spaces, not underlines as can be seen on your screenshot.