These past few days, looking at on-chain data, I got fooled again: for the same transaction, it already showed as successful on my browser at A, but B still says "not found"... To put it simply, what you see on the "chain" is a view pieced together by nodes/RPC/indexers, not an omniscient perspective. RPCs have caches, nodes are out of sync, indexers need to scan blocks to build the database, and when there's congestion or reorganizations, it gets even more ridiculous—delays of several minutes are considered gentle.

So now, when I check data, I first think: did the chain really not record this, or is the data source I’m connected to slow or disconnected? This also helps me understand why there's so much recent fuss about privacy coins, mixing, and compliance: many people discuss "on-chain visibility" as if data is always accurate and accessible, but in reality, even public blockchains can be delayed, not to mention the parts intentionally hidden. Anyway, when I make my own judgments, I try to look at at least two sources and be less confident that "what I see is the fact."