So I believe this is only happening to events from group pings (not sure if it applies to @*user pings because I haven't been mentioned for anything lately) but even though you ping now, it'll say the ping was made 1 hour ago. It's not a big issue, but I'm just making note of it. It doesn't seem to affect other kinds of events. The pings themselves show up on time, it just shows up "1 hour ago" when I go to see when the ping was sent. I don't know if it goes up for pings that were pinged longer than an hour ago though since I usually close pings after I see them.
Tldr: If I send/receive a group ping now or anytime less than an hour, it'll show up as "1 hour ago" in the hover text.
Oops, sorry. I checked this forum but didn't see it reported, I should also check known errors too. ^-^
Please make sure you check out the 🌟 Known Errors List - 11/9/14 in the Known Errors & Troubleshooting sub-forum. This issue has already been reported, and the thread is listed in the topic listed above. :)