Issues with Sanskrit Transliteration

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Hello, When in "Sanskrit - Transliteration" enabled I was trying to type in my name as मम नाम जिग्नेश I tried to use the phonetic letters "sha" for getting श but I always got ष as in जिग्नेष. What English letters should I use so that I can get श?

I also found issue while typing गणेश using ganesh or gannesh. I always got गनेष . Looks like there can be more issues in transliteration.

Thanks, Jignesh J Gohel