When importing a Tilemap from LDTk, it makes its Atlas image blurry, and therefore map is blurry as well. I have Scale mode set to Nearest and I’ve disabled Rounding pixels. Other sprites are not blurry when imported.
Importing Tilemaps from Tiled seems to be working fine.
Check in your project resources panel to ensure “smooth image” is not checked on your atlas image, in the resource list.
I’ve taken a look and “smooth image” is checked. I have to manually uncheck it every time I add a new map.
I even opened up a new project just to make sure, and it still happens. Maybe someone else can confirm or deny if it happens for them as well.