So I used this charm item shortly after I was attacked and feigned death. It normally has a resue time of 1 minute. Now it shows me over one hour and can't be used again:
Ok obviously it carried over the time from the other charm item I used to this one. After unequipping and re-equipping it, it showed the correct time again.
Yeah, this one is a weird UI issue, where it sometimes 'saves' the downtime to the charm slot instead of the actual charm. It doesnt seem to happen every time or with every charm so I'm not sure if it is client or server side that causes it.