Your bot will have a received an error message saying you can’t send the whisper.
I’m not getting an error message. Otherwise the reload of the website would not work either.
Generally speaking whispers are not a reliable way for a bot to communicate to a user. Generally speaking a bot can reply to a whisper, but it cannot start a whisper conversation.
This means that if the viewer would whisper the bot, for example with the command, then the viewer should also get a message?
I will test this out.
You may also consider getting your bot verified which can help Limit Increase | Twitch Developers but it generally will not.
I have already done this and my bot has been approved.