I'm noticing what appears to me as a bug with Irradiance Volume (Light Probes) in Eevee. When creating an Irradiance Volume object and setting the viewport display method to Rendered, the light coming from the emitter mesh does not appear around the mesh itself, but gets piled up in a corner of the probe.
I'm using Linux 64bit Blender 2.8 build (Jun 16 2018 01:16:47). My OS is openSUSE Tumbleweed x64. My video card is a Radeon R7 370 (GCN 1.0) amdgpu.