Sure. The email from my profile should reach me.
The trouble with the Python Elasticsearch library is that it limits the audience. If I wanted to reproduce exactly what you're doing I'd have to setup python and everything. If I turn it into curl commands might lose something in translation. If you do it you can make sure the bug still comes up. Anyway, this is my guess at a recreation:
curl -XDELETE 'localhost:9200/abc?pretty'
curl -XPUT 'localhost:9200/abc?pretty' -d'{
"settings": {
"index.mapping.coerce": true
}
}'
cat >> mydocument.json << HERE
doc here
HERE
curl -XPOST localhost:9200/_bulk --data-binary "@mydocument.json"; echo