I have an Ender 5 plus which had been pretty steady for the past year but now even the easiest of prints seems to get layer shifting… sometimes on the X and some times on the Y axis… I though it was a blob issue which I seem to have fixed with a new silicon sox but once again it happened last night…
The simplest thing is something is getting snagged somewhere. Before doing anything else check the cables to be certain you are not catching something. I tend to use the interface to move all the axis to the fullest extents. I can watch and be certain they are not hanging up someplace.
I am using an Ender 3 Max and I started having layer shifting issues 2 months ago. After searching the web, I found various suggestions but the one that seemed to make the best improvement was grounding all the motors to the power supply enclosure (frame ground). In the process, I changed the control board not long after I grounded the motors. I think the motor drivers were partially damaged by the electrostatic discharges. Using the new board seemed to improve a little bit more.
I have a couple of the 5plus in my farm, they were notorious for layer shift. I realized it was the wiring that comes from the rear right corner of the machine to the extruder was getting hung up randomly.
I use the of those retractor reels and zip tied it to the wiring and screwed it to the wall. haven’t had a shift since.