If oracleImpl
of certain token defines Chainlink, then Chainlink aggregator is used to return token price in USD. It uses 4 hour timeout for all such tokens.
However different tokens have different heartbeat, so it means that for certain tokens price will be unavailable because staleness is handled incorrectly.
Here you can see it uses 4 hours:
For tokens with 1 day heartbeat price will be unavailable most of the time: 20 hours a day.
Manual review
Configure timeout for every token.
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