What's wrong with this entry?
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When fast mode status cannot be determined due to network connectivity issues, it now defaults to disabled (network_error) with the message "Fast mode unavailable due to network connectivity issues" instead of silently failing.
Evidence
Fast mode fallback (search for "Fast mode unavailable due to network connectivity issues")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.