Hi,
You did not answer my questions about the "id" poperty. TinkerPop uses a Token.ID that has the value 'id', see:

https://github.com/apache/tinkerpop/blob/master/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/T.java

I suspect that you ingested data without schema validation ("automatic schema creation"), that your input data contains an "id¨ property key and that JanusGraph/TinkerPop get confused about which id is what. So I strongly suggest that you make sure that this is not the root cause of this issue. To be sure, it would still be an issue but not for you anymore :-)

Best wishes,    Marc