My Environment

Expected Behaviour

Running jekyll build --incremental in separate executions result in my site being updated.

Current Behavior

jekyll build --incremental ignores any and all changes to my home page's data files, it outputs exactly the same web page after each build. Using jekyll serve -i -l works, however.

Code Sample

I've uploaded my (very much stripped down) toolchain at https://github.com/amyspark/jekyll-4-demo-bug. Run yarn (it includes the bundle step) and then yarn dev.
Finally, try and edit any of the dates in _data/amyspark.ymland check if the page updates accordingly.