As the title says, my Tilemap sprites are invisible in the window, however they display when using the brush in the scene view, i just cant see them in the tilemap window.
Ive tried creating new pallets however the same issue occurs when creating a new one, haven’t found anything about this online and im not sure what to do.
thanks for any help.
Annoyingly I am having this exact same issue.

Hope the image above helps
Same issue… 
Version 2017.4 2f2.
On a second computer it works but there is Version 1f1 
I’m having the same issue on Unity 2018.1.0f2 Personal (64bit). Tiles are invisible in the Tile Palette, but can be selected and painted onto the scene, where they’re visible.
I have the same issue when i upgrade my project to Unity 2018.1.0f2
Same issue started when upgrading to 2018.10f2 from whatever the final 2017.3 release was. Really annoying bug : (
Hi,
in this thread: Tile Palette they have answered this:
This is fixed in the Beta version so they do know about it
Unity Editor Beta Releases “2D: Fix tiles not rendered in tile palette window (1010103)”