In babel plugin options, I ignore some files, then rollup tell me:

Sourcemap is likely to be incorrect: a plugin ('babel') was used to transform files, but didn't generate a sourcemap for the transformation.

And the generated sourcemap is wrong indeed(not contain the ignore files)
How can I get the full sourcemap that includes the ignored files of babel plugin?

The following is my babel plugin option:

{
    babelrc: false,
    "presets": [
        ["latest", {
            "es2015": {
                "modules": false
            }
        }]
    ],
    "ignore": [
        "dist/*.js",
        "vendor.js"
    ],
    "plugins": [
        "external-helpers"
    ],
    externalHelpers: true
}