Only have one EQ session running on the network. It will randomly throw these errors in the console and a minute or two later, it is no longer processing any updates, including player character's orientation and any spawn updates.

Code:
Warning: SEQ: Giving up on finding arq 4db0 in stream client-zone cache, skipping!
Warning: SEQ: Giving up on finding arq 4de4 in stream client-zone cache, skipping!
Warning: SEQ: Giving up on finding arq 4de5 in stream client-zone cache, skipping!
Warning: SEQ: Giving up on finding arq 4de6 in stream client-zone cache, skipping!