rrinehart - Thanks for confirming.

I am wondering if anyone here came to any solution in regard to upload issue through packet tunnel. During uploading on high speed network, we always get this error “utun_output - ctl_enqueuembuf failed: 55”. Download is fine. We tried tuning some of kernel buffer sizes (going through “sysctl -a”) but no success. We're testing on macOS Monterey ver. 12.2 Apple M1 chip. Any response is greatly appreciated. Thanks, Dankira.