Payment URL/metamask deeplink does not work for transferring USDT in Arbitrum network

Question

I generated the following deeplink with https://metamask.github.io/metamask-deeplinks/#

https://metamask.app.link/send/pay-0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9@42161/transfer?address=0xrecipient&uint256=1e5

• 0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9 is the USDT contract address, see contract on Arbiscan
• 42161: arbitrum chain id: Arbitrum network info
• uint256=1e5: the amount to be sent, in this case 0.1

And I receive: Internal JSON-RPC error

I tried all other combinations:

• transfer ETH on ethereum network: ok
• transfer ERC20 on ethereum network: ok
• transfer ETH on arbitrum network: ok

Only the combination above seems not to work

ref ERC-681: URL Format for Transaction Requests