fix: backgound input validation issue #14

[zulfikar-ditya]

Description

Please include a summary of the changes and the related issue.

Type of change

• Bug fix
• New feature
• Breaking change

Checklist

• I have followed the contributing guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• My changes generate no new warnings
• I have added necessary documentation (if appropriate)

Related Issues

Closes #<issue_number>