Plane and Grid are not working as Fluid Effector Collision in Blender 2.82 In my scene the liquid goes through the plane or grid, no matter what the settings are, but with a cube it works as it supposed to. 

I've tried with option "is planar" checked and with surface thickness other than 0 but the effect is still the same.
I had the same problem.. So I added a value of 0.75 on surface thickness, and it work well !! :)