@dadziuk OK, that's the same version I'm using, I haven't had the problem in a while so I don't know what it could be-

@dadziuk yes I had the same problem with my ER8411, but it's been a few controller versions since, I don't remember which version, as far as I remember I had to start and stop the controller to fix...

@Bonfigleo It probably has nothing to do with it, but I use Initiator Mode on both routers.

Bonfigleo wrote @Clive_A Yes, both are on 1.2.3. IPSEC site-to-site with all the defaults either auto or manual. I should also mention that they are both on a single controller. @Bonfigleo My router...

@Balaji_MRIT here is a How to configure DPI on Omada Gateway via Omada Controller https://www.tp-link.com/en/support/faq/4143/

@MelvinO