Denouncing is there to prevent multiple detection where there is only one. In general, you can make a denouncer with zero latency: the receiver still triggers

Denouncing is there to prevent multiple detection where there is only one. In general, you can make a denouncer with zero latency: the receiver still triggers on the first logic change for idle to active, but then gates any further changes for a while. (At least, that’s how I design all my debouncers.) There may be aspects that are specific to a matrix keyboard configuration that prevent this...