If it's the same issue, Tech Support sent me these instructions that fixed the issue for my particular setup (7/26/24) and it DID fix the issue: Thank you for contacting Meraki Technical Support! Can you temporarily enable the WAN3 Backup feature, modify the WAN 1 bandwidth settings, and then disable the WAN 3 backup feature, and then try modifying the WAN 1 configuration again just to ensure the WAN 3 backup feature is no longer being referenced? Keep in mind, when temporarily enabling the WAN 3 backup feature, the physical port usage will change to the following: On the MX85, MX95 & MX105 - The Fourth physical port is the designated backup port. Physical ports 1 & 2 become designated WAN 1 and WAN 2 ports.
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