Manual revert #19078

[uc4w6c]

Relevant issues

#19078

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• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• My PR passes all unit tests on make test-unit
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CI (LiteLLM team)

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• 50-55 passing tests: main is stable with minor issues.
• 45-49 passing tests: acceptable but needs attention
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Type

🆕 New Feature
🐛 Bug Fix
🧹 Refactoring
📖 Documentation
🚄 Infrastructure
✅ Test

Changes

After reverting #19141, the following error started occurring, so I reverted this as well:
tests.test_litellm.test_router::test_acompletion_streaming_disable_fallbacks_midstream

CI job:
https://app.circleci.com/pipelines/github/BerriAI/litellm/54583/workflows/3e05e204-8362-4043-913c-6338692cbded/jobs/1073281/tests

Reverted PR:
#19078

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Project	Deployment	Review	Updated (UTC)
litellm	Error		Jan 16, 2026 10:01pm