No matter which node you switch to, basic mode or advanced mode, it will display MUDEC_00235.**Connection Protocol:**UDP (Port 10023) - Simple FEC.**RTT Checking Method:**UDP.MTU:1250.FastConnect mode :off.WFP item mode:on.Credit Saving mode:off。
The nodes I choose all show normal in the speed test, and I have also tried many others, and they all show the same.
For this case, please check MUDEC_00235 link for details. However did you try to change Connection Protocols to another?
Hello, I tested the TCP connection protocol, and the RTT check method is also TCP. I selected several different valid nodes, but all of them directly lost all the data. And it still shows MUDEC_00235.
That’s not good. 
Might be that something blocks and monitor your traffics. Not sure if sending Problem Report is possible from your machine. If possible, please send it to me. I’m curious how the internal logs look like…
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Hello, I tested the UDP protocol and the TCP protocol, and I have sent you the test logs.