Empty list of notification on subwiki

I didn't try to reproduce yet, I had the bug on xwiki.org.
Here's what I saw: I was on www.xwiki.org and got a notification from a page of dev.xwiki.org (subwiki). When I clicked on the notification to see the page (also tried on the link to see the diff), I've been redirected to the subwiki: the notification bell kept telling me that I got 1 notification, but now the notification list is empty.
If I try to go to another subwiki (test.xwiki.org or extensions.xwiki.org) I keep seeing my list of notifications, but when I go to dev.xwiki.org (where is located the page of the notification) the notification list is always empty, even if I see that I have 1 notification.
I tried to refresh the page and clear cache without change, and I don't have any javascript console errors.

It might be an infra issue about xwiki.org but I'm quite not sure.