Hi Nils,

As long as my LAN problems persisted, I experienced some waterfall freezes as well, but they were temporary and did not last more than a few seconds. They were always mapped to pairs of entries  "Radio PlutoSDR> NOT Ready / Radio PlutoSDR> Ready" in the logfile. Do you see those pairs of messages in your logfile as well? If the time difference between not ready and ready is just some milliseconds, the issue is not due to power interruptions, as rebooting and getting ready on the network takes some seconds.

To narrow down the problem, you can log your network traffic with Wireshark and look for evidence of network problems like errors/warning/repeating packets etc.

Did you enable System Debugger Diagnosis in the Audio options menu? Maybe you can get additional hints from some System Debug entries.

If you are using GPU support and run other programms in parallel that also make usage of the GPU, this may lead to some stuttering of the waterfall as well. While this slows down the response, it does not crash the program.

73 de Jean DJ0VL