Have been using whisper.cpp server on my local machine in lieu of the "main" program, to serve Blurt and BlahST because of the performance advantage (~90 x real time, as described here ).

I load the server on machine startup and keep it running, but many times now, after a long period of inactivity (say an hour), when I send an API request, the server will blow up and exit abnormally. ps call shows it as zombie i.e. defunct and the logs say:

... ending with the curl API call being unsuccessful: "curl: (52) Empty reply from server"
(Timeline is bottom to top, I do not understand why it is repeating the request receipt and inference steps, a successful call doesn't look like that)

Anecdotally, "unspecified launch failure" is most often a segfault but could it be thread synchronization issue in this case?
Or is it indeed some sort of out-of-bounds memory access on memory that has been released on a timeout?
GPU is RTX3060, 12GB

I can probably test a server run without cuBLAS support to see if the issue persists.