Do you have a bunch of APs, and when the users have the issue they are connected to a specific AP?  You might find the switch port connecting to that AP has an issue.   Does anything interesting show up in Wireless Heath? https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Meraki_Health_Overview   ... View more

I would not expect that to extend your time. But you can give it a try. ... View more