Hello. I encountered a strange behavior, that I have not noticed before, and I fear I may have accidentally changed some setting. When I use filter>map>small tiles, the space outside of the canvas borders gets factored in, and includes hidden strokes, that extend past the canvas edge. Going into wrap mode before doing small tiles seems to solve the problem, but I was hoping someone would know what is actually going on. I appreciate your help. Sorry my first post here is a question. I can help out too, once I have a better understanding of the software. Thanks.
(edit) I also found that: select all>>image>>size canvas to selection fixes the problem

oh my god you are a blessing from the heavens

size canvas to selection is a lifesaver