Nukes not updating target's health.

[Shodo]

I've had an issue the last couple days while playing my wizard - and only my wizard - toons on the same account, played from the same computer, have no issues.

When I cast a nuke on a target, the damage goes through (I get the "so-and-so has been hit by non-melee for x damage" message), and I can kill the mob like normal. However, their health bar remains unchanged at 100% until they die, rather than updating to a lower percentage after the spell lands. Has anyone else experienced this issue in the past, or know how to fix it?