TON liteservers sync stuck - client cannot complete synchronization

[illogicallogic4]

Problem

client-runner gets stuck at ~99.5% sync and cannot complete synchronization with TON blockchain.

Details

TonLib is syncing: 54,978,194 / 55,002,696 (99.56%)
Remaining: ~24,500 blocks
Time stuck: 10+ hours with zero progress

Errors

All 18 public liteservers return errors:

Sync error: [Error : 500 : LITE_SERVER_NETWORKchain->to=54975195...]
ExtClient: failed to send query to liteserver: [Error : 653 : ]
Sync error: [Error : 500 : LITE_SERVER_NETWORKtimeout for adnl query query]

Client cycles through all liteservers but none work stably:

• 5.9.10.47:19949
• 5.9.10.15:48014
• 135.181.177.59:53312
• 135.181.140.212:13206
• 164.68.99.144:20334
• ... (all 18 servers)

Environment

• OS: macOS Darwin 25.1.0
• Build: compiled from source (ninja)
• Config: mainnet, using ton-global-config.json from ton.org

Questions

1. Are there alternative/more stable liteservers for client sync?
2. Is there a way to skip the final block verification?
3. Is this a known issue with TON infrastructure?

Logs

Client runs for 10+ hours, constantly retrying liteservers with no progress on final ~24K blocks.