We’ve had a sync issue on our eth2 nodes which should be fixed, @Juan@injp in case you still see this would you mind sharing what endpoint and what query params you’re hitting when seeing this error ?
Dec 21 21:29:22 ubuntu lighthouse[1808]: Dec 21 21:29:22.041 INFO Connected to beacon node endpoint: https://eth2-beacon-mainnet.infura.io/, version: teku/v21.12.2/linux-x86_64/-eclipseadoptium-openjdk64bitservervm-java-17
Hello. I was using infura for my beacon node with lighthouse. Starting last week I started missing about 50% of the attestations and saw the errors mentioned in the thread. I asked for help on the Lighthouse dischord (others had this same issues too) the Lighthouse team hypothesized that one of the Infura beacon chain nodes was falling behind. Since I was missing so many attestations I started to run my own beacon node so I can no longer repro to issue. But it seems to be a real issue encountered by others too.