Starknet Mainnet Halt on January 5, 2026 Freezes Ethereum L2 for Over Two Hours

On January 5, 2026, Starknet's mainnet experienced a halt that paused block production and froze transactions for over two hours, as developers said they were investigating. The block explorer later indicated block production had resumed, while prior incidents in September 2025 and April 2024 highlight ongoing reliability challenges.