I have two astroboxes set up for our printers. We have a Prusa i3 MK3 & a Creality CR10 S4. I am getting layer shift issues about once a month. When it does happen it seems to happen twice in a row. I have had to resort to using SD cards instead of my Astrobox sometimes to fix the issue. The layer shift seems to happen most often in the X Axis. I have had this issue on both my CR10 & i3.
My astroboxes are both connected to the network via CAT5 Cables. They are both powered by a battery backup.
Pictures of the shifting issues here: https://imgur.com/a/YQCxQMI