@fabio_brandao1 How are your dual WANs connected? If one of them has latency issues you wish to avoid, why not configure your WANs in Link Backup mode? That way, the more reliable WAN will be your primary, and the less reliable is just a failsafe for when the first one goes down?

Here's an FAQ explaining how to do that. How to Configure Link Backup on Omada Gateway via Omada Controller | Omada Network Support

  @NeilR_M 

Thanks for the reply, yes I did that too thinking about that possibility, but incredibly, the router continued to use the backup internet connection! And even in Online Detection, it marked the link as offline (which was expected), but the ER605 continued to use that link that was marked as offline (backup) to connect to the Wireguard main server... really very strange. I will do more tests.

Is there any future update for the Wireguard settings to prioritize a specific internet link?

  @fabio_brandao1 Unfortunately, I don't see any plans in the works for this change to be implemented. If you'd like, you can go ahead and submit that as a suggestion in our Requests and Suggestions module. Suggestions with high vote counts are more likely to be considered for implementations by development. 

Please let me know the results of any further tests!