Failed to parse source-maps with PercentageEncoded Urls

[viyaha]

• Operating System: Windows
• Node Version: 14.15.0
• NPM Version: 6.14.8
• webpack Version: 5.9.0
• source-map-loader Version: 1.1.2

Expected Behavior

No warnings, source-maps can be loaded.

Actual Behavior

Failed to parse source map from '[...]%7Bindex%7D.js.map' file: Error: ENOENT: no such file or directory, open '[...]%7Bindex%7D.js.map'

Code

Typescript fixed in issue regarding percentage encoded Source-Maps:
see:
microsoft/TypeScript#41752
microsoft/TypeScript#40951

The source-map-loader seems to not be able to load percentage-encoded file-urls:

{index}.ts:

console.log("just testing... doesn't matter what we use here");

{index}.js (compiled with typescript 4.0.5, source-maps can be loaded)

console.log("just testing... doesn't matter what we use here");
//# sourceMappingURL={index}.js.map

{index}.js (compiled with typescript 4.1.2,source-maps cannot be loaded)

console.log("just testing... doesn't matter what we use here");
//# sourceMappingURL=%7Bindex%7D.js.map