I need too know how is the configuration on Meraki. There are subtle differences between the Meraki and the C9800.
Give us more informations, please.
802.11n is a wifi standard, so this information is not useful at this time.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.