I picked up the new iPad Pro 11 inch model. I'm getting a lot of pops and crackles when playing the Moog apps in both standalone and AUv3. Namely, Moog Model D, Animoog and Model 15.. (I haven't tried filtatron yet)
Although I didn't really get to use the AUv3 version much, because the GUI is black and only the knobs appear.
Here is Model D opened in Garageband:

I wasn't expecting the GUI to be optimized yet as the 11 inch model is a new screen size, but the pops and crackles are pretty relentless. Interestingly though, other AUv3 apps that have not optimized for the new screen size appear fine in AUv3 format.
One of the main reasons I bought the iPad is because of these great apps. Looking forward to see what the A12x chip can handle once this gets resolved.
~James