Graph Synonym search case sensitive

Elastic Stack Elasticsearch
2

I think you should pay atention to the filters order

"synonym": {
"type": "synonym_graph",
"synonyms_path": "analysis/synonyms.txt",
"updateable": true
}
"analyzer": {
"my_synonyms": {
    "tokenizer": "standard",
    "filter": [
        "lowercase",
        "synonym",
    ]
}
}