Hugo emits WARN Unable to decode metadata from image: /path/...jpg for some JPEGs, and silently fails to capture IPTC metadata for others. Affected images are typically darktable /
Lightroom exports — any JPEG whose APP1 XMP segment exceeds ~4 KB and is followed by an APP13 IPTC segment.

For affected images, depending on file content:

• Loud: warning logged, all metadata for the file is empty (.Date, .Exif.*, .XMP.* all unavailable in templates).
• Silent: no warning, EXIF and XMP captured normally, but .IPTC is empty.

In my personal gallery of 626 JPEGs, 13 fail loudly and 247 fail silently.

Details can be found here: bep/imagemeta#65