I have started to see signature warning in light client logs. Maybe it requires investigating.
Version: 1.7.9
OS: Ubuntu 22.04
2024-03-11T20:54:03.777110Z DEBUG avail_light::maintenance: Maintenance completed block_number=525743
2024-03-11T20:54:23.064769Z INFO avail_light::network::rpc::subscriptions: New justification at block no.: 525745, hash: 0x9d8a45a30862a259bfe82e093e2f7480fc2b9372cb0b3049f058901271b4f8ec
2024-03-11T20:54:23.066159Z INFO avail_light::network::rpc::subscriptions: Header no.: 525745
2024-03-11T20:54:23.066706Z WARN avail_light::network::rpc::subscriptions: Signature verification fails with default set_id 215, trying alternatives.
2024-03-11T20:54:23.067546Z INFO avail_light::network::rpc::subscriptions: Signature match with set_id=214
2024-03-11T20:54:23.067725Z WARN avail_light::network::rpc::subscriptions: Signature verification fails with default set_id 215, trying alternatives.
2024-03-11T20:54:23.068501Z INFO avail_light::network::rpc::subscriptions: Signature match with set_id=214
2024-03-11T20:54:23.068668Z WARN avail_light::network::rpc::subscriptions: Signature verification fails with default set_id 215, trying alternatives.
2024-03-11T20:54:23.069415Z INFO avail_light::network::rpc::subscriptions: Signature match with set_id=214
2024-03-11T20:54:23.069572Z WARN avail_light::network::rpc::subscriptions: Signature verification fails with default set_id 215, trying alternatives.
2024-03-11T20:54:23.070436Z INFO avail_light::network::rpc::subscriptions: Signature match with set_id=214
2024-03-11T20:54:23.070612Z WARN avail_light::network::rpc::subscriptions: Signature verification fails with default set_id 215, trying alternatives.
2024-03-11T20:54:23.071443Z INFO avail_light::network::rpc::subscriptions: Signature match with set_id=214
2024-03-11T20:54:23.071542Z INFO avail_light::network::rpc::subscriptions: Number of matching signatures: 5/7 for block 525745, set_id 215
2024-03-11T20:54:23.071667Z INFO avail_light::network::rpc::subscriptions: Storing finality checkpoint at block 525745
2024-03-11T20:54:23.072115Z INFO avail_light::network::rpc::subscriptions: Sending finalized block 525745