Still happening. Only seems to happen in some NA games but not other regions.
[HLTV Broadcast] 3299.97. Requesting sync
[HLTV Broadcast] 3300.03. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (1) failed. Error 404 Retrying sync
[HLTV Broadcast] 3300.03. Retrying sync in 7.72 sec
[GCClient] Send msg 9109 (k_EMsgClientToGCSpectateLobby), 39 bytes
[GCClient] Recv msg 9110 (k_EMsgClientToGCSpectateLobbyResponse), 78 bytes
[HLTV Broadcast] 2892. Stream State Sync -> Stop, fragment 715
[HLTV Broadcast] 3301.07. Broadcast: Synchronizing stream
[HLTV Broadcast] 3301.07. Requesting sync
[HLTV Broadcast] 2892. Stream State Stop -> Sync, fragment 715
[HLTV Broadcast] 3301.11. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (0) failed. Error 404 Retrying sync
[HLTV Broadcast] 3301.11. Retrying sync in 3.19 sec
[GCClient] Send msg 9203 (k_EMsgClientToGCGetActiveMatches), 17 bytes
[GCClient] Recv msg 523 (k_EMsgGCCompressedMsgToClient_Legacy), 28869 bytes
[HLTV Broadcast] 3304.30. Requesting sync
[HLTV Broadcast] 3304.36. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (1) failed. Error 404 Retrying sync
[HLTV Broadcast] 3304.36. Retrying sync in 7.20 sec
[GCClient] Send msg 9203 (k_EMsgClientToGCGetActiveMatches), 17 bytes
[GCClient] Recv msg 523 (k_EMsgGCCompressedMsgToClient_Legacy), 28876 bytes
[HLTV Broadcast] 3311.56. Requesting sync
[HLTV Broadcast] 3311.65. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (2) failed. Error 404 Retrying sync
[HLTV Broadcast] 3311.65. Retrying sync in 6.38 sec
[GCClient] Send msg 9203 (k_EMsgClientToGCGetActiveMatches), 17 bytes
[GCClient] Recv msg 523 (k_EMsgGCCompressedMsgToClient_Legacy), 28893 bytes
[HLTV Broadcast] 3318.03. Requesting sync
[SteamNetSockets] SteamNetworkingSockets lock held for 8.1ms. (Performance warning.) ServiceThread,SteamDatagramClientThinker::Think,EnsureDataCenterRoutesValid,ThinkPingProbes
This is usually a symptom of a general performance problem such as thread starvation.
[SteamNetSockets] Waited 8.0ms for SteamNetworkingSockets lock [GetSessionConnectionInfo]
[HLTV Broadcast] 3318.11. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (3) failed. Error 404 Retrying sync
[HLTV Broadcast] 3318.11. Retrying sync in 5.44 sec
[GCClient] Send msg 9203 (k_EMsgClientToGCGetActiveMatches), 17 bytes
[GCClient] Recv msg 523 (k_EMsgGCCompressedMsgToClient_Legacy), 28892 bytes
[HLTV Broadcast] 3323.55. Requesting sync
[HLTV Broadcast] 3323.62. stream
http://dist1-ord1.steamcontent.com/tv/25204946/sync (4) failed. Error 404 Not retrying sync
[HLTV Broadcast] 3323.62. Retrying sync in 5.21 sec
[GCClient] Send msg 9203 (k_EMsgClientToGCGetActiveMatches), 17 bytes
[GCClient] Recv msg 523 (k_EMsgGCCompressedMsgToClient_Legacy), 28894 bytes