Multi entry point duplication

[mytecor]

• Operating System: Windows 10 2004
• Node Version: 14.11.0
• NPM Version: 6.14.8
• webpack Version: 5.0.0
• stylus-loader Version: 4.1.1

Expected Behavior

.box,.child,.test{border-width:2px;border-style:solid;padding:0 20px;margin:0 6px;max-width:400px}
.child{border-style:dotted;border-color:#008000}
.test{border-color:#f00}

Actual Behavior

.box{border-width:2px;border-style:solid;padding:0 20px;margin:0 6px;max-width:400px}
.box,.child{border-width:2px;border-style:solid;padding:0 20px;margin:0 6px;max-width:400px}
.child{border-style:dotted;border-color:#008000}
.box,.test{border-width:2px;border-style:solid;padding:0 20px;margin:0 6px;max-width:400px}
.test{border-color:#f00}

How Do We Reproduce?

Repo

yarn build

[alexander-akait]

It is not problem with stylus-loader, please ask this in stylus repo

[mytecor]

But with single entry it works fine