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If you would like to reach specific devices on the WR11 LAN, you can try to use port forwarding, please see here two available options (the firewall option is more flexible so maybe would be better for your needs): https://ftp1.digi.com/support/documentation/qn_004_port_redirection.pdf
It also depends on how the LAN devices are configured, so please check that the LAN devices have default gateway/routing properly configured to use the WR as gateway.
If still this does not help, please open a Tech Support case writing an email to email@example.com, providing a backup file from the router being sure to include at least the debug,txt file in it so we can check all the details.
Please also check Digi Support levels options here: https://www.digi.com/support