Overriding boundary character for highlighter

Elastic Stack Elasticsearch
1

Hi guys,

I have been trying to use ES highlighter with boundary character ~( tild), but it's not working out for me.
Below is my sample text from field Text.

~Anmol JewellersRudrakshahtml~ मुखी रुद्राक्ष का सतारुढ़ ग्रह~ ~चौदह मुखी रुद्राक्ष के लिए अनुशंसित~ धन~ ~Anmol Jewellers and Ratna Kendra~

Query:

{
"fields": [
"Text"
],
"from": 0,
"size": 10,
"query": {
"multi_match": {
"query": "मुखी रुद्राक्ष",
"fields": [
"Text"
]
}
},
"highlight": {
"order": "score",
"fields": {
"A18": {
"boundary_max_scan": 200,
"number_of_fragments": 1,
"fragment_size": 60,
"boundary_chars": "~",
"fragment_offset": 0
}
}
}
}

Result:
JewellersRudrakshahtml~ मुखी रुद्राक्ष का सतारुढ़ ग्रह~ ~चौदह मुखी रुद्राक्ष के लिए

I have gone through following related post as well.

http://elasticsearch-users.115913.n3.nabble.com/highlight-whole-sentence-td4022069.html#a4022077

I feel that fragments are not been created properly. Where am I going wrong ?

Thanks
Amlan