Seems the resolution of the final sprite not is the same you put in the sprite size.
Click on the image and in the bottom options click on "Size: Make 1:1". Run again and see if is solved. I had this problem some times, i don't know if this will be your problem, try that.
i mean, maybe if you updated the imgae and in some case you resized if you copy another image this will have the resolution+previous% of the resize you added previously. So with "Size: Make 1:1" the size of the image wll be the same as the original.
Or create another blank sprite and copy or load an image and see if still happen. If that then maybe the screen resolution on your project settins see if you have: Crop, scale inner or whatever, if i remember well for pixelart: Letter box integer scale.