I don't know about "soon". It will be cluster-safe in 4.0. It's a consequence of architectural limitations that can't be fixed in 3.5. (I have actually been working on this exact problem for the past 3-odd months already.)
This is a known limitation of the fulltext indexes in 3.5. See the NOTE on https://neo4j.com/docs/cypher-manual/3.5/schema/index/#schema-index-fulltext-create-and-configure
The documentation on the procedures themselves also warn about this.
If you w...