Hi,
transparency shaders seem to be completely broken in URP (Lit, SimpleLit, Particles/Lit, Particles/Unlit… except legacy particles shader). Even though the material is set as transparent, the objects are rendered in opaque pass with ZWrite off. So the objects are overdrawn by skybox and other draw calls. Fiddling with priority sometimes solves this issue, but not always and usually after restart it doesn’t work again. 
