Thanks for the reports, everyone. There’s definitely something going wrong here, but we haven’t sorted out what it is yet. From initial tests I couldn’t cause desync using Arcane Ascendance with Acuity in moderate intensity combat scenarios, but it has been reported often so I still suspect it’s involved.
Additional reports with details of what skills you’re using are helpful, especially if a certain skill or node seems to result in more desync. It would also be helpful to know if this occurs when playing together with other players, or when playing solo online.