fix: continue updating backends during shutdown

[grounded042]

What this PR does / why we need it:

Draft PR for fixing #13215. Will fill out more soon.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] CVE Report (Scanner found CVE and adding report)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation only

Which issue/s this PR fixes

fixes #13215

How Has This Been Tested?

I've tested it manually via make dev-env and following re-production steps in #13215

Checklist:

TODO

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I've read the CONTRIBUTION guide
• [ ] I have added unit and/or e2e tests to cover my changes.
• [ ] All new and existing tests passed.