this is how you reproduce the error. Hopefully, it is not installation specific:
after saving the list has the same URL on all of its element, even it should be different. The HTML structure is fine.
It's a Redactor bug and I've reported this to Imperavi already. Hopefully, they fix it soon.
Still unfixed as of Redactor 3.1.1
Still unfixed as of Redactor 3.1.2
The latest version of Redactor has some references to a bug with links in lists. Do you know if this addresses the bug? https://imperavi.com/redactor/log/
Seems to be resolved with the latest Redactor version. Working my way down the priority list to get to a new Redactor plugin release.
We're still on Redactor 2.1.7 because we can't upgrade to Craft 3.1.x yet.
On Redactor 2.1.7, this is still an issue. Do you know, for sure, if this is fixed in the newer versions?
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Seems to be resolved with the latest Redactor version. Working my way down the priority list to get to a new Redactor plugin release.