Record names that that map to a table name which contains invalid characters cause writes to storage to silently fail.
To reproduce:
var rec = ds.record.getRecord('foo-bar/32');
rec.set({x: 1});
At this point the record behaves normally as its in the cache, but it hasn't been written to storage, and on restart or cache eviction the record will be lost.
RethinkDB only allows A-z 0-9 and '_' in the table name which is what is causing this.
Note there is no error message when this happens. ( logLevel: DEBUG )