tx wasm upload --block flag

We're having an issue with v0.51.0 (also tested previous versions) where the `-b` or `--block` flag don't appear to work. We've tested putting the flag in different argument positions, to no effect.

For example:
```
wasmd tx wasm upload /app/asc.wasm --from --chain-id testing --gas-prices 0.25ucosm --gas auto --gas-adjustment 1.3 -y --output json -b sync
```

Yields a response like:
```
{"height":"0","txhash":"","codespace":"","code":0,"data":"","raw_log":"","logs":[],"info":"","gas_wanted":"0","gas_used":"0
","tx":null,"timestamp":"","events":[]}
```

I would expect those fields to be populated, as in the documentation https://docs.cosmwasm.com/docs/getting-started/interact-with-contract/

Please advise how to make synchronous calls. It's quite important to our automation.