Devices with webserver connected to IOT interface can no longer be accessed via hostname

[vgaetera]

mDNS is typically limited to a single broadcast domain, so it's problematic to traverse subnets.

[SOLVED] How do I increase DNS local-ttl in OpenWRT?

It's best to change your domain to .lan or .home and avoid using domain .local for DNS. The domain .local is reserved for mDNS which may conflict with DNS on the clients.