A few members of our community have been studying the latest snapshot code and they claim to have found an issue in the class LegacyRandomSource.
Java documentation specifies that Next(bits) should return (int)(seed >>> (48 - bits)). However, current code seems to return (int)(seed >> (48 - bits)).
This could cause future issues related to nextInt returning negative numbers in rare cases, and incomplete parity with Bedrock.

Members that confirmed this issue in our community: cortex and MrSpike.