The countdown timers on the enemy plates have disappeared. How do I get them back?

Check if the Hide Aura Duration is checked in your profile settings. That's the only reason, settings wise, that I can see as being the cause.

If this isn't checked I'd try disabling any new or recently updated addons to rule out any conflicts.

It's probably just be a single weakaura causing the issue, as if it was the entire addon I should have the same issue.

I'm having the same issue out of nowhere. Can confirm, timers do reappear after disabling Weak Auras. So I deleted all auras but the problem still persists when enabling WA.

Hmm, I wasn't able to reproduce this myself so I assumed it was an aura that was causing the issue. But I'll see if I can mange to reproduce it later today.

Are you having this issue in Retail or Classic? In case it is only impacting one and not the other.

Thanks for the quick reply! Woops, forgot to mention I'm having this issue on Classic :)

Still wasn't able to reproduce this when I try.

You could try creating a new clean profile and see if the issue persists. Other than that the only other thing I can think of is that WeakAuras isn't the sole reason for this happening. But rather it being a certain combination of addons that combined with WeakAuras is causing this to happen.

And if I'm just going to be mentioning possible variables that I cannot replicate. Then the client region is also a possibility, but that is extremely unlikely given the nature of the issue.