After upgrading my router to the firmware 2.0.0 0.10 v6041.0 Build 240708 Rel.13164n, local network devices couldn't get the IPv6 address, while the IPv6 seemed OK on the router web interface. Previously, it was working.

Downgrading to Archer VR1210v 1.0_2.0.0 0.9 v6041.0 Build 221027 Rel.12900n.bin, with no changes on the web interface, I was able to get IPv6 on my Windows PC in the LAN. Now IPv6 works flawlessly.

Seems like the latest firmware isn't able to manage the IPv6 addresses to the LAN network devices.

I'm using RADVD, RDDNS, Site Prefix Delegated.

Please advise and fix in a new firmware.