I don’t know what I did or what happened, but for some reason the paint bucket tool is painting the entire canvas regardless of if I try to use it in an enclosed area or drawing. Why is this happening?
Try setting the Tolerance option to 0 and checking the Contiguous option:

Thank you so much! That fixed the issue 
I’m having a similar issue, however I have both of those options set correctly… The paint bucket tool won’t paint individual squares, instead painting the entire canvas.
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