I have a model with 35 collections in it and I'm using a condition in my Flow to check the "Collection Confidence" score for each PDF and if it is less than .7 (70%), I'm terminating the Flow and sending an email. This is working great on most collections but on some of them -- the score is NULL. I've never seen that happen with a custom document processing model. Can someone tell me why that is happening? I AM getting a Collection Name from it though.