Reproduced on at least SFF and MSE, on:

  • Windows 10, Firefox 74.0, logged in
  • Android 5.1.1, Chrome 80.0.3987.132, logged in
  • Windows 10, Microsoft Edge 44.18362.449.0, logged out (by copy-pasting a link with the ?lastactivity parameter)

Clicking on the /?lastactivity links does not redirect to the latest activity, only to the question; for instance, if I click the following, I'm redirected to the question itself, not Robert Longson's answer.

link to an answer as last activity

I do have some userscripts running on Firefox, but none on Edge or Chrome for Android.


A subtle change here in query string handling behavior in .NET Core and how our shim adapter handled it (checking if there was a value for that key - which there isn't in this case).

A fix has been pushed for the next build. Thanks for the report!

  • Works perfectly again, thanks for the quick fix! – Jenayah Mar 30 '20 at 19:40

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