Haukke Manor Instance Lag?

I've seen an issue the last two nights in Haukke Manor.

I've been playing with no issues since launch, and now while running Haukke Manor the last two nights, battles entirely freeze for me for 5-10 seconds.

I can keep casting, then once the lag stops all my spells and the battle replays very quickly. It happens again like 30 second later.

Any thoughts? It seems isolated ONLY to this instance. Haven't seen it happen a single time anywhere else.

Thanks