I am glad to see a dev responding on this subject as its a big problem of mine. My bot I use is named “DunkBot” however if it was simply just my bot that this fix was for I would come up with a workaround but its actually my clients as well that whisper from their standalone IRCs that create an issue for me. They also cant whisper me from their IRC so even if I was able to whisper them they cant whisper me in the first place to trigger the command unless they use the browser.
If we are able to start a whisper conversation through IRC and it actually send to the user then all my problems will be solved.