Dev team fixes RPC desync errors during Polygon hard forks with block-padding buffer

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A development team encountered real-time transaction tracking failures caused by RPC endpoint desyncs during heavy network loads and blockchain upgrades. Public shared RPC nodes were dropping events due to indexing propagation lags, triggering 'invalid block range' errors when querying the chain tip. To resolve this, the team implemented a programmatic block-padding delay that queries logs three blocks behind the current chain tip, creating roughly a six-second safety buffer. This approach prevents polling of unfinalized blocks and stabilizes the asynchronous reward voucher pipeline. The fix ensures full data accuracy for user claim balances across the multi-tier infrastructure.

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