Is your feature request related to a problem?
In issue #3000 with PR #3161, we decided to not consider IP-based rolemapping into the scope of OBO authentication. According to this, we should have an integration test case to capture this design.

What solution would you like?
A potential place to implement this is at the existed integration tests suite of OBO auth (source code)

Good state for closing this issue
This test case should specifically assess whether the OBO auth remains unaffected by host mappings, particularly IP-based roles mapping. After setting up the test environment, we can issue a token and evaluate its functionality, ensuring it operates independently of any preceding host mapping configurations.