You'll notice
Useful2 Signal2
Chart embedding is abandoned if the injected block can't be cleanly stripped back out again.
What's wrong with this entry?
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What
Publishing an artifact embeds a charting library plus an init script. That combined block is now run back through the code that strips it out, and if it does not come out cleanly the whole embed is abandoned and reported with a new telemetry reason. The same self-check already guarded the syntax-highlighting embed.
Evidence
chart_block_unstrippable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.