[Bug] @preserve @endpreserve does not work in js

[AECOM-VDC]

🐞 Bug Report

Describe the bug

@preserve @endpreserve does not work properly in js.

// @preserve
// something 
// @endpreserve

will result in
// @preserve
*

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Is this a regression?

I don't know.

To Reproduce

enter below in js code

// @preserve
// something 
// @endpreserve

2. save to auto minify

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Expected behaviour

it should show
// something
instead of
// @preserve

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Media prove

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Your environment

• OS: Windows 10
• Node version: N/A
• Npm version: N/A
• Browser name and version:

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Additional context

[welcome]

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