#RC#
Systemic delays are often just a result of the natural latency in distributed ledger updates. When metamask-extension fails to update the state, it often points to a stale browser session . Check the official community announcements to see if there is an ongoing protocol upgrade. The sudden appearance of an “invalid JSON-RPC” error is usually a node glitch.
A mismatch in the chain ID settings will prevent metamask-extension from broadcasting to the blockchain. Most minor glitches are resolved automatically as soon as the network congestion clears. The error message is often a high-level summary of a more complex internal contract revert. The move toward modular blockchain layers has introduced new types of synchronization errors.
Layer 2 network delays can sometimes lead to “ghost” transactions that appear much later.
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