I just noticed that Iceblock stopped showing up on my enemy nameplates in PVP. Notice that this enemy mage is in iceblock, that my other addon triggered the cooldown timer for it, but there is no BigDebuff on the right hand side (which would be covering up the cooldown timer):

These are my Nameplates settings:

Spell Immunities settings (untouched):

Priorities settings (untouched):

I will continue testing with certain options turned on and off.

I re-downloaded bigdebuffs and deleted the files in the wtf directory but the problem still persists. Is there anymore troubleshooting I can perform to understand what errors might be going on?

I turned off all UI addons except big debuffs and it still doesn't work. No lua errors unless I highlight over the weird, empty rows in the spell lists.