Most jupyter notebooks and their output are not easily reproducible due to hidden cell states.
Each cell is in it’s current state due to the order it was run in the notebook. This is not always straightforward.
Even if you don’t have cells that use randomization, if the original creator ran cells maintaining their states, then adjusted their order when running or skipping a cell in subsequent runs, the next person who runs it won’t be able to reproduce it running it from scratch.
You may run a notebook always skipping a cell, while the next person to run it doesn’t skip that cell. In these situations, you’ll end up with different output.
Cells executed in different orders give you different output. You can override the linear run of cells in jupyter.
Being able to run snippets of code in arbitrary order can be unintuitive.