Nonce too low: transaction on C-Chain failing

[Bitcoinera]

While trying to fund my Metamask address on the local C-Chain I get this error:

Error: Returned error: nonce too low
    at Object.ErrorResponse (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/web3-core-helpers/src/errors.js:29:16)
    at /usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/web3-core-requestmanager/src/index.js:170:36
    at XMLHttpRequest.request.onreadystatechange (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/web3-providers-http/src/index.js:111:13)
    at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/xhr2-cookies/dist/xml-http-request-event-target.js:34:22)
    at XMLHttpRequest._setReadyState (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/xhr2-cookies/dist/xml-http-request.js:208:14)
    at XMLHttpRequest._onHttpResponseEnd (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/xhr2-cookies/dist/xml-http-request.js:318:14)
    at IncomingMessage.<anonymous> (/usr/local/go/bin/src/github.com/ava-labs/ava-faucet/node_modules/xhr2-cookies/dist/xml-http-request.js:289:61)
    at IncomingMessage.emit (events.js:327:22)
    at endReadableNT (_stream_readable.js:1221:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)

which makes the transaction failed altogether. Tried a couple of things and saw the nonce is actually 0 when doing web3.eth.getTransactionCount(myAddress), but I am not sure is this is the nonce from Ethereum mainnet? Actually, it should be 0 too on the local C-Chain since I didn't make any transaction from that address.

Then it worked once when restarting the faucet (npm run serve) but I didn't do anything special 🤷 Strange