New merging-error when it comes to breaking down with levenshtein

[Krassmus]

{
"title": "Levenshtein-Test",
"original": "One tre four five seven.",
"mine": "One thre four five six seven.",
"theirs": "One two tree four five seven.",
"expected": "One two three four five six seven.",
"result": "One trefour five seven."
}

In JS. In PHP it strangely is the result "One thre fwo treur five six seven.", which differs from the JS-result. Both is wrong.