I had Umbrel installed on a virtual ubuntu server running on Proxmox. Turns out Proxmox is very unstable on my hardware and corrupted my umbrel harddrive.

I now just have it installed bare bone (not virtual) and will install back-up software to automatically save my channel backup file daily.

Just be sure to have a channel backup every time you open or close a channel, don't rely on automatic back-ups by Umbrel itself or Amboss (both didnt work for me).