First I strongly recommend downgrading to version 16.16.6, if you look we have several other threads open related to instabilities from version 17.x and version 18.x is a Beta version yet.
Meraki even removed version 17.10.1 from the stable release list.
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.