In commit 4c34e17 on branch main, Cargo target release, Rust toolchain nightly-x86_64-unknown-linux-gnu, when setting the default_gamemode to survival and level to trace with an otherwise default config.toml, and after breaking at least one block, a few randomly positioned block aren't there on login-logout-login. You can logout then log back in as many times as you want and a different set of random blocks are missing. I have no idea how to precisely reproduce this.
In commit
4c34e17on branchmain, Cargo targetrelease, Rust toolchainnightly-x86_64-unknown-linux-gnu, when setting thedefault_gamemodetosurvivalandleveltotracewith an otherwise defaultconfig.toml, and after breaking at least one block, a few randomly positioned block aren't there on login-logout-login. You can logout then log back in as many times as you want and a different set of random blocks are missing. I have no idea how to precisely reproduce this.