Mikrotik didn't fix anything. TM made some changes for your BNG.

Mine still cannot do 1492.
If Mikrotik truly fix it then it should be able to do 1500 or whatever number you put in it.

Yes. Confirm not working for me.
Tested it 2x with 1500 and 1492 when 7.20b2 just release.
Tested it again when read your post.
Tested again before replying this post.

What's your location?

Disabled keep alive still getting 1480. On v7.19.1

Any examples of arm processor models?

The space limitation I mentioned prevents me from getting any of the ones that have to sit flat, with the exception of the small squares like the hEX types. Also, I am currently on 500mbps Unifi package.

Thanks. So hAP AX2 and AX3 are also ARM. I will look into the Chateau pro AX but it is a bit over my budget at the moment.

RM400~600. The Chateau pro AX is currently RM775 on Shopee so it's a bit over that.

Most likely will go for either the hAP AX2 or AX3 since both can stand upright.

Lol, maybe if it goes on sale for low enough.    But I don't think the AX2's WiFi performs as well as the C9 for a 2-storey house based on my experience these past several days, and I need something that is at least on the C9s level. Thinking of getting a Deco mesh 2-Pack so I can just do away with the Wireless Repeater.

One last troubleshooting step I will try first is changing the C9's power adapter, if I can find a 12V 4A or 5A one lying around somewhere. I've seen faulty power adapters cause strange issues, so it's worth a shot.

You mean for the TP Link router? Because I am not using the hAP AX2's wifi at all.

So MTU fixed?

Mine still show 1480, with no error log anymore.

Mine still show 1480, with no error log anymore.