I found Apple’s approval process to be hit or miss. Most of the time everything was approved without a problem, sometimes you get a nasty reviewer and all you had to do was just resubmit and it would usually go through.
Going through this with the client app now, hoping it will eventually pass. Did not work at all with the free app, they kept on ignoring anything I replied with and just copy/pasted the same response. Disheartening.