You'll notice
Useful3 Signal1
Zip-installed plugins keep their pinned version instead of being re-fetched on every load.
What's wrong with this entry?
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What
A plugin whose cache directory is a 12-character hex name used to be treated as tracking a git ref, which meant it was re-fetched on every load. That check now also requires the plugin to come from a git source, so zip-archive plugins, whose cache directory is the first 12 hex characters of the archive digest, keep their pinned version.
Evidence
sourceHasPinnedSha
Strings lifted out of the shipped bundle, so the claim above can be checked against them.