I was fishing up in the Dendrome yesterday with the celestial fishing rune equipped and noticed every catch was a single fish. I didn't do an exhaustive test, but generally, 20 minutes of fishing produces at least a couple multi-fish catches. I tested other zones in Dusken/Brevane briefly and pulled multiple fish elsewhere (but I didn't check the Steppes of Infinity).

I'm wondering if the purple fish in Dendrome/Steppes might be causing a problem with the rune.

Anyone else noticed this? Known issue?