Tendermint 34 adaptor attempting to base64 decode event attribute

[jmrossy]

When attempting an IBC transfer from Neutron to Celestia, after the transfer is signed and sent by the wallet, the CosmJS Tendermint package attempts to base64 decode a string value that is not base 64, throwing an error. See this line here: https://github.com/cosmos/cosmjs/blob/main/packages/tendermint-rpc/src/tendermint34/adaptor/responses.ts#L117

In my case, a key value of acc_seq is what's being decoded:

I noticed that the Tendermint 37 adaptor does not attempt to decode the event key & value which makes we wonder if maybe the problem is that the wrong adaptor is being used?

Tested on version 0.31.3