cubicweb #635587 ajax requests wait forever if instance was restarted [open]

If I have a view with tabs and the server is restarted, trying to change the displayed tab (or any ajax request) will result in a "wait wheel" spinning forever, and nothing tells me I have to re-authenticate.

prioritynormal
typebug
done in<not specified>
load0.500
load left0.500
closed by<not specified>