Solana WebSocket times out eventually

[fadeev]

After a few minutes of localnet running, this happens:

eth_blockNumber
eth_blockNumber
Error monitoring new transactions: TypeError: fetch failed
    at node:internal/deps/undici/undici:13185:13
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async ClientBrowser.callServer (/Users/fadeev/github.com/zeta-chain/localnet/node_modules/@solana/web3.js/src/connection.ts:1675:17) {
  [cause]: Error: connect ECONNREFUSED 127.0.0.1:8899
      at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1607:16) {
    errno: -61,
    code: 'ECONNREFUSED',
    syscall: 'connect',
    address: '127.0.0.1',
    port: 8899
  }
}