Docker push pushes image but build fails with 'Could not find manifest.json in Artifactory in the following path'

The image is effectively pushed to artifactory, but gets the "Could not find manifest.json in Artifactory in the following path: ..." error.
It seems like we are searching for the manifest at
https://artifactory.sigfox.io/docker-snapshots/docker-snapshots/software-factory/oplog-tail/1.0.0-SNAPSHOT/manifest.json
but it should be
https://artifactory.sigfox.io/docker-snapshots/software-factory/oplog-tail/1.0.0-SNAPSHOT/manifest.json
(repo path duplication).
So the build fails with a NPE and do not upload the build info.

Script used to reproduce below.

note the docker-snapshots both in tag and Docker.push

pipeline {
agent none
stages {
stage('Build & Deploy snapshot'){
when

agent any
steps {
script {
def server = Artifactory.server 'artifactory-sigfox'
def rtDocker = Artifactory.docker server: server
version = sh (
script: 'cat package.json | grep version | head -1 | awk -F: \'

\' | sed \'s/[",]//g\'',
returnStdout: true
).trim()
tag = "artifactory.sigfox.io/docker-snapshots/software-factory/oplog-tail:$version-SNAPSHOT"
echo tag
sh "docker build -t $tag ."
def buildInfo = rtDocker.push tag, 'docker-snapshots'
server.publishBuildInfo buildInfo
}
}
}
}
}