Abby FlexiCapture Classifier in IntelligentOCR activities not working in UiPath Studio

Hello, I created a classifier in FlexiLayout Studio and it is working fine there (successfully classifying docs). However, using the classifier (part of IntelligentOCR activities) in UiPath Studio is always resulting in “unknown” given that I am testing it on the same training & validation set used in FlexiLayout Studio. Did anyone face this issue before?