Since 2.2.0 giving negative limit does not work.
Negative limit is valid MongoDB value (https://docs.mongodb.org/manual/reference/method/cursor.limit/#negative-values)
and worked as expected.

It's broken since https://jira.mongodb.org/browse/RUBY-1033
without explanation or error.

Commit:
https://github.com/mongodb/mongo-ruby-driver/commit/f1503de20ec35dd025240aa5a2a582df3af3836d#diff-0b2050a2a348c2d3c671360acd89874bR99

Setting "singleBatch" does not work the same.

-1 was useful because <5.x versions of mongoid were adding sort while using #first or #last, but IMHO it still should work as before.