Searches with a slash in them give no results eg. AC/DC

[jripmeester]

Our client has a large records collection in their Craft installation. But when they search for AC/DC no results are returned. But when is search for AC/DC in the elastic.co console the correct results are returned.

It seems to be going wrong with the slash which gets escaped with a single \ but it needs \.

This is the query i use in the console which works:
{
"query": {
"query_string": {
"query": "ac\/dc"
}
}
}