I just completed the process of restoring my Byron Yoroi wallet into the Shelly Testnet Wallet. All was proper re: addresses and checksum etc., and the window before wallet creation showed my Byron wallet with full proper balance, so I know it was seeing the blockchain snapshot properly.
The problem is, the new Testnet Yoroi wallet shows 0.0000 balance and 0 transactions. No error messages, simply nothing in it. It’s been nearly 45 minutes. Is it a waiting game?