If the subnet of both Spokes is enabled to participate in the VPN, they will know the route to each subnet through the Hub, and of course if you have any Firewall rules configured you need to release ICMP, otherwise it won't be a problem.
I didn't understand this sentence "And communication from each PC to hub shouldn't disturb."
You don't want communication to go through the Hub? Would it be this?
Another important point, often the Windows Firewall or aintvirus blocks ICMP, so if you are going to do a test, disable both.
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.