The most common failure modes
Strong proof can still be easy to undervalue.
A resume should not just present evidence. It should help the reader understand what that evidence proves. Framing, weighting, and sequence all affect the conclusion a reader reaches, which is why strong experience can still seem less relevant, less senior, or less credible.
What it looks like
The material contains real evidence, but it supports multiple possible readings of role, level, or direction at once, so the reader never gets a stable frame for interpreting the rest.
What it costs
The candidate may have relevant experience, but the material creates false ambiguity about where that experience fits. Good proof gets underweighted because the reader is not sure which conclusion it is supposed to support.