Regarding item loss, I had an issue where I broke a pipe connector and lost the pipe connected to it. I think there was also an issue of some items getting trapped when placing tiles on them, although this was sort of expected. Also, and I'm not sure this is a bug or not, but items that fall into the ocean tend to disappear. ... I think this may be an issue in part because metal is somewhat rare. For the save file failure, I was holding down the fast-forward key for a while, pruned some branches off of a tree (the waterfruit, I think?) and then saved and exited. The game appeared to exit normally, but the log ends differently:
02:26:33 [DEBUG] (3) main::game: Next day ready 02:26:33 [INFO] Settings saved 02:26:34 [ERROR] Terminal must be dropped after all `Escape`s 02:26:34 [ERROR] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: "SendError(..)"': main/src/game/mod.rs:334 02:26:34 [ERROR] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: "SendError(..)"': main/src/update_loop.rs:157
Running it again, I get:
02:10:12 [DEBUG] (3) main::game: Next day ready 02:11:12 [INFO] Settings saved 02:11:12 [ERROR] Terminal must be dropped after all `Escape`s 02:11:12 [ERROR] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: "SendError(..)"': main/src/game/mod.rs:434 02:11:12 [ERROR] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: "SendError(..)"': main/src/update_loop.rs:129