[tor-relays] IPv6 Support or Uptime?

I have IPv6 with my ISP, but there seems to be a bug in the firmware of my networking equipment that causes IPv6 to stop working periodically and I have to take my network down and bring it back up. If I do not do this, my relay stops functioning as I have torrc configured to use IPv6 and IPv4. So, my question is whether or not having a higher uptime is more important or having IPv6 support? My relay never goes down when on IPv4 only. I apparently cannot have both until the firmware bug is fixed. I appreciate it!