There are some online brands which added such ''controls'' or ''limitations'' within their systems and thus protecting their players from breaking max bet bonus rule incidentally or not. However, let's be honest it costs a lot of money doing that and it's definitely not each and every online casino could afford.
But then comes the players again who are free to choose whether they prefer to play in a casino brand which care about their customers and do anything possible to prevent them breaking some casino/bonus rule and have their casino experience ruined or not.