When IPV6 would drop on my 2 google tv devices

Ironically, I also had the same issue with my iOS devices on wifi plus 2 google tv streamers that weren't hooked up directly to the main router, but connected directly to the satellite in each room.  I bought the Obi RBE871 back in November of 2025.  I listened to all the advice here like disabling ipv6 and turning off wifi assist on my phones.  I already always kept Mac randomizers off on my devices and I always set my wifi channels to 1 & 48 and not auto.  When my network was ipv4 only, I felt like the drops were even worse with ipv6 and everything else turned off.  I have Comcast 1.2 gig speed internet.  I started to realize that I needed to figure out how to get ipv6 working with Comcast.  Like I said, I had issues when IPV6 was on but not as bad as ipv4 only.  I noticed that every time the router renewed its lease that's when IPV6 would drop on my 2 google tv devices.  Through some research I learned that Comcast used DHCP 6.  The only way I could originally get a LAN & WAN address was by using auto detect in the ipv6 settings.  Overtime I realized the Comcast ipv6 dns servers were not populating.  So my next move was to use CloudFlare or Google ipv6 dns servers.  Things started to move in the right direction.  So now that I had populated the addresses in autodetect, I then switched it to DHCP6 in the ipv6 router settings and readded the CloudFlare ipv6 dns servers and added a 1 in the user class field.  Since I did this, everything has been working as it should.  The google 4k streamers would normally disconnect after 12 hours no matter what, now everything stays on.  My recommendation is to reach out to your ISP and see if they can walk you through setting up IPV6 the right way.  Good Luck!