24.10 Breaks ipv6 for Linux and Android phones clients

[bodaay]

I've tried doing a fresh install to elimnate all other possible issues

configure the bare minimum

WAN interface with PPoE
IPV6 Using DHCPv6 (send hint and Use IPv4 connectivity)

LAN Interface set to track WAN Interface with manual. Setup RA with Assisted and enabled ISC DHCPv6

The same setup works just fine with 24.7.3

in 24.10, ipv6 sites mostly will stop working.

when I test with test-ipv6.com using Firefox, I can see the ipv6 but I get 1/10 score because of MTU size issue

if I tried using Brave and Google Chrome, it does not work at all and ipv6 not even recognized

Android Phones will keep loosing the ipv6 ips, and getting them back.

Windows, Mac OS x, iPhone, no issues at all

same setup in 24.7.3, everything is working superp and I get 10/10 in all tests