Error on replacing file with same name, leads to deleted existing file

[vinsensiussatya]

Library version : 0.10.15 RN version : 0.58.4 Device : iPhone 5S with iOS 12.4

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Steps to reproduce :

1. Have an existing file in a folder with a same name, for example someDocument.pdf
2. Download a file with a same name to that folder.
3. A popup will appear with the options to Replace or Keep Both files.
4. Selecting Replace will delete the existing file but will not replace it with a new file because it says the file doesn't exist.

This is my code

const filename = "someDocument.pdf"
const docPath = `${RNFetchBlob.fs.dirs.DocumentDir}/${filename}`
const url = "http://some.website.com/downloadfile"

RNFetchBlob
.config({
    fileCache: true
    path: docPath
})
.fetch('GET', encodeURI(url), {})
.then((res) => {
    this.setState({submitted: false})
    RNFetchBlob.ios.previewDocument("file://" + docPath);
})

Thank you for the assistance