I'm not sure exactly what you did, I tried adding a grid sprite to a stage and it shows up pixel-perfect
I will try remove and put it again or edit the sprite to see if it works
found out how to solve it!
I separated the sprites into smaller sprites and put it together in the editor like a puzzle
Ah, if the sprites are VERY large, it could be a texture page related issue (the game has to downsize them to fit them on the page). Either way, glad you found a solution!