ExternalTransform is not providing a unique name

Using multiple ExternalTransform results in a naming collision. A simple pipeline example:

A minimal reproducable example:

Start ExpansionService/JobService:
./gradlew -p runners/flink/1.8/job-server runShadow

Then run a baisc pipeline with two ExternalTransforms:
https://gist.github.com/sambvfx/e8b08acac8ded19e86ecefaa79a8a272