[Bug]: resume_from_checkpoint silently skips the root-level (trained) adapter when the checkpoint contains adapter subdirectories — DPO loss stuck at ln(2) ≈ 0.6931, no error or warning
Public issue #50204 in huggingface/transformers. The source issue contains the full report and discussion.
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Research analysis
Reported problem
The record contains the title “[Bug]: resume_from_checkpoint silently skips the root-level (trained) adapter when the checkpoint contains adapter subdirectories — DPO loss stuck at ln(2) ≈ 0.6931, no error or warning” but no substantive source summary.
Frequency & alternatives
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Demand hypothesis
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Commercial evidence gaps
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