MR600 sending 2 RA i think one is expired, so to renew ipv6 i has to reboot the device, but i am running a Raspberry Pi web server for hobby projects which has to run 24*7 without reboot
FYI: I have this beta firmware which provides XLAT for JIO ISP(India) & there is no official release yet.

I don't have much experience in networking, so please let me know if its any configuration issue on my side, below is my observation

This was the ipv6 provided by Jio ISP (2409:40f2:300f:c0ec:1e61:b4ff:fec7:d6a)

Currently, the device is connected over wifi & has the correct ipv6 since I rebooted, but sometimes it will have the expired ipv6
but it has one expired route i.e.,  2402:8100:281a:48f0::/64

You can see here i got 2 RA,  2402:8100:281a:48f0::/64 & 2409:40f2:300f:c0ec::/64,
i think only 2409:40f2:300f:c0ec::/64 is valid right?
I tested RA on Raspberry Pi 3B+(6.6.51+rpt-rpi-v8), ubuntu 22.04 LTS (5.19.5-051905-generic), & windows 11 and all receiving 2 RA in which one might be invalid
& for Invalid RA the source MAC is also different & not matching with MR600 LAN MAC Address



(ref: https://community.tp-link.com/en/home/forum/topic/673214)

please fix the issue or let me know what could be wrong if its on my side, 
Thanks