I build 9vx from source and routinely have it running for days, until I need an ubongo reboot in fact. Don't know how to figure out what's different but I do know that gcc/glibc/distros in linux universe are so variable, literally week to week, that the build environment is very unstable. That might be an issue with any prebuilt version, or a version you build yourself -- you really can't win.
ron