Steps to reproduce:

CommandBuffer cmd = new CommandBuffer();
RenderTargetIdentifier rtId = new RenderTargetIdentifier(arrayTexture, 0, CubemapFace.Unknown, RenderTargetIdentifier.AllDepthSlices);
cmd.SetRenderTarget(rtId);
cmd.ClearRenderTarget(false, true, clearColor * 0.5f);
Graphics.ExecuteCommandBuffer(cmd);
cmd.Release();

Actual results: 
Only the first array slice is cleared.

Expected results: 

All array slices are cleared.

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes: