Offline and Sync Issues

Anyone seeing errors with checkpoint sync today?

If the usual checkpoint sync https://checkpoint.gnosischain.com/ doesn't work, you can try using https://checkpoint.gnosis.gateway.fm/ if they are both down, don't hesitate to report it as the team might not be aware yet
My (dapp)node have been offline for a couple of hours. After restart attestation and block proposing resumed, but duties in sync committee still shows missing even after a few hours since it's up again. Does anyone has an explanation for this?

Maybe it was related to an Intel chip bug that was fixed by Dappnode
Installed Nethermind and Lighthouse on a new arm, let it sync for 24hrs and deposited validators after. Now all my validators are leaking. Do I need to wait for sync still or have something misconfigured?

Nethermind might take longer than 24h to sync. Wait and check. This error could also be related to recent sync issues.
If my Gnosis validator have been offline for a long time (several months) and I restart it, do I need to withdraw and re-deposit the collateral, or can I just wait for it to become active again? How long will it take until it start earning again?

Update everything and wait until sync is finished, just remember to make sure your keystores are properly imported into your web3signer gnosis
Using checkpoint sync, but all my nodes are down. Why?

If the usual checkpoint sync https://checkpoint.gnosischain.com/ doesn't work, you can try using https://checkpoint.gnosis.gateway.fm/ if they are both down, don't hesitate to report it as the team might not be aware yet
Just realized my validators are off line since the beginning of the month, can someone take a peek and help?

Delete the Nethermind database and let it sync from scratch
Hey, I run 50+ validators and seems like it misses heads quite frequently. Beaconchain shows I have average effectiveness of 88%. Any ideas on what is the most limiting factor? Just thinking what I can do to improve this.

In most cases the most important factor are: a synced clock (ntp), and a good internet connection
Is there a new checkpoint for Gnosis?

The two common checkpoint sync are : https://checkpoint.gnosischain.com/ and https://checkpoint.gnosis.gateway.fm/
My Gnosis node is crashed a month ago, was there a breaking chain upgrade a month ago?

Gnosis Chain had the Shapella upgrade early August 2023, validators had to update their clients to continue validating.
Can I use checkpoint sync with Nethermind?

There is no checkpoint-sync or fast sync yet for Nethermind, syncing Nethermind from scratch can take up to +/- 2 days