System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-17 19:54, hash: rB9609840b5ea1
Worked: (optional)

Short description of error
This has to do with whether there are any other objects in the scene
I also think it's only in solid mode in viewport shading

1.Create a new scene, create an emty object, turn on and off x-ray,
now create another object and turn on and off
x-ray The empty object disappears along with the click

2.Changing alpha in viewport Display property to any object effects the empty objects alpha

if in front is on so the emty remain visible.
if there is no other object in the 3d view the emty remain visible.

maybe ading color and aplha to empty object will solve all problems.