I'm setting up an ACL for a WLAN to rate limit iOS devices and allow all others by default. When I apply this method, all non-iOS clients disconnect and cannot connect to the WLAN. I'm under the impression that all non-iOS devices should be able to connect to the WLAN without any rate limit restriction.
What software version are you running on the controller? Have you checked known product issues for you version of software? The setting 'allow all by default' should mean other devices can connect but maybe there is a bug in your load.