Thank you for re-opening this task Krenair and my apologies Krenair for not realizing the cache does not update as quickly as I expected.

Thank you Krenair, and thank you Glaisher. Please note especially this part of the conversation https://en.wikipedia.org/wiki/Wikipedia_talk:Special:DeadendPages#Deadend_Pages_Broken.3F which I posted above. An example of a page listed as dead-end is number 1 on the list https://en.wikipedia.org/w/index.php?title=Alternative_Tea which you can see is a working link. also number 2 https://en.wikipedia.org/wiki/Arnaud_Leclercq and number 7 https://en.wikipedia.org/wiki/Carnwath_Farms_Historic_Site_%26_Park and many many more on the list. Hope this helps narrow down the problem.