The Podcast namespace specification recently deprecated the old podcast:images field which is now replaced by podcast:image.

The new implementation of podcast:image (plural) should follow the spec of this new field and be accessible via images (same as before).

As for the deprecated podcast:images, it should still be read and parsed, possibly "upgraded" to the new format where each element of the srcset would be a separate image object in the new array with the value set as href attribute.

When generating a feed, only new syntax should be supported.