“Asset X has no meta file, but it's in an immutable folder. The asset will be ignored.” errors are thrown when importing package with files not listed in package.json's "files" property

Reproduction steps:
1. Open the attached “BugRepro” project
2. Observe the Console window

Expected result: No errors are thrown
Actual result: “Asset X has no meta file, but it's in an immutable folder. The asset will be ignored.” errors are thrown

Reproducible with: 6000.0.38f1, 6000.0.48f1, 6000.1.4f1, 6000.2.0b1
Not reproducible with: 2022.3.60f1, 6000.0.37f1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: Not reproducible when reopening the project