Hi @colorthought welcome to the forum. Thanks for your findings here. We are looking into reports of this behaviour such as this thread however they can be difficult to reproduce. Do you find this is happening often in regular use?
This kind of behaviour can happen with keys lock chord mute disabled however it should not be happening when mute is enabled.
We are working to improve some aspects of keys lock including the reaction speed to chord triggers so hopefully we can address this also.