Standardly, each industry shows a "Workers live in:" value which features three or four nearby cities. However, in Experimental, when a new city is built, it is added to the "Workers live in:" list of every existing industry, no matter how far away that industry is from the new city.
I ****ume that this is a bug, rather than a feature? Having done some testing, it seems that the bug only arises in Experimental. (Running 8.2, pak64).
This would indeed be a bug - I shall have to look into this. Thank you for the report :-)
No problem -- I look forward to hearing the outcome! :-)