The feeling you get when you're on the chain and suddenly experience a lag / missing segment / half-minute delay — it's mostly not your internet connection. Basically, it's because any one of the three network segments is struggling: the front-end querying the subgraph (the indexer needs to process blocks/logs before storing them), the indexer falling behind during reorganizations or peak times; or your RPC being rate-limited, with 429 errors causing retries, making the page look like it's glitching; or even more severely, some free RPCs secretly downgrade, returning old block numbers, causing the data to "rollback," like hitting a wall repeatedly.

Now, when I review failed swaps, I usually check: whether the mempool was congested at the time, if the block heights seen on different RPCs for the same transaction match, and whether the subgraph's sync height is lagging — don’t start blaming the smart contract right away. Recently, some people have been criticizing validators for MEV extraction and unfair ordering; actually, the "price jumps" you see sometimes are just the ordering pushing you into the middle, but the page still uses outdated index data to fool you into thinking everything's stable. That’s all for now.