Difference in Sage.jar between Windows and Linux builds

I have been working on rebuilding the Unraid Docker solution and was running into an issue with the Java8 docker as SageTV would run but a placeshifter would not connect. The issue was related to a change in Java between 8 and 9 and Byte(ByteBuffer).

The odd thing is I often test using Java 8 on windows and had no issues connection a placeshifter...both builds were the latest 9.2.6 releases.

So I copied the Sage.jar from the windows release into the linux docker and restarted SageTV and now I was able to connect the placeshifter to this Java 8 docker.

In my research I find that you can build a jar using JDK9 with the --release=8 option and it will resolve the Byte/ByteBuffer compatibility issue.

So are we using this --release option for the Windows jar build and not the Linux build or what is different in the 2 build processes that makes the Linux build fail on Java 8 but the Windows build works?

Thoughts?