Tensorflow 1.9 / Object Detection: model_main.py only evaluates one image
I've updated to Tensorflow 1.9 & the latest master of the Object Detection API. When running a training/evaluation session that worked fine previously (I think version 1.6), the training appears to proceed as expected, but I only get evaluation & metrics for one image (the first). In Tensorboard the image is labeled 'Detections_Left_Groundtruth_Right'. The evaluation step itself also happens extremely quickly, which leads me to believe this isn't just a Tensorboard issue. Looking in model_lib.py, I see some suspicious code (near line 349): eval_images = ( features[fields.InputDataFields