Hi, has anyone here experienced unexpected drops/buffers of streams to YouTube that were not caused by an internet connection or a local area network?

We're streaming 4K stream to YouTube at 15000 video bitrate with vMix 24.0.0.72 on Windows 11 via RTMPS.

This is the end part of the log file when the stream drops: https://pastebin.com/raw/kCA9z3cB
Full log file: https://drive.google.com/file/d/1AVrAES7cvG1r6ew1WGQCHq0Im7eWMxKI/view?usp=sharing

Internet speed is probably not the problem since we're running 200Mbps upload: https://www.speedtest.net/result/12731510764.png and I've been assured that the network infrastructure at our building is probably not the problem.

Our network technician has also provided me with a firewall report when we did our testing and it seems that YouTube CDN might be dropping the stream since the firewall reports "Connection Reset by Destination". It seems unlikely but, who knows...

We've found the vMix KB article regarding the matter, but I don't see any way how I can further test the problem... :/
https://www.vmix.com/knowledgebase/article.aspx/140/understanding-ffmpeg-streaming-logs


Has anyone got any suggestions or experience with a similar problem?


Thank you for your help! :)