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
bumping this up to get any update on this, after two months of the latest production release
just to add, the weird part on linux machines, ping, wget all will work just fine.
only browsers will stop working with ipv6 sites and test-ipv6 will fail all results
Android phones will keep disconencting the ipv6 since no connectivity can be detected
Have you tried setting RA to managed and using SLAAC only? What's the reason you need DHCPv6 on LAN? As you already found out Android for one does not support DHCPv6 at all.