MsgGrantAllowance doesnot provide allowance context using signingStargateClient

[hard-nett]

Currently looking to create a button that lets a wallet register themselves for a feegrant on a network that includes the x/feegrant module. I have found that when the message is being signed & broadcasted, the data in the allowance type is not populated into the final signing msg.

Testing the exact same process using the cli command with flags, the message was signed and broadcasted with the correct allowance data.

Any insight on what could be the issue is greatly appreciated!