Description

My two lighthouse beacon nodes frequently report a warning in the logs:

Jul 10 23:21:40.821 WARN Single block lookup failed              outcome: Err(WouldRevertFinalizedSlot { block_slot: Slot(1594432), finalized_slot: Slot(1594528) }), service: sync

I am not sure what it means and what I can/should do to get rid of it.

Version

v1.4.0-3b600ac

Present Behaviour

I run two lighthouse beacon nodes on two separate devices. I monitor the warn rate of these instances, which is usually ~1/h. However, since approx 10.07., both instances report a significantly higher warn rate (~20/h). Most (or all) of the warnings are messages as quoted above.
I cannot classify this warning nor do I know how to counteract. A google search didn't help, so I would like to ask here for enlightenment.

The nodes are on mainnet, I use openethereum for eth1.

Expected Behaviour

No warnings should be logged.

Steps to resolve

Unknown.