fix: avoid mutating _layers

[pi0]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

We introduced a fix in #1418 to reverse scan layers and regression of #1404. By calling reverse() we were mutating original _layers too causing whole layer scanning logic after content being broken.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[pi0]

An alternative would be not reversing layers and instead push component dirs (we can do in another PR as currently scanning is broken).

/cc @atinux Do you remember why had to originally unshift component dirs instead of pushing?