Replay is crazy this year.
That one angle proved safe pretty conclusively I thought... Gunnar's glove blocked the view of the foot as it was hitting the bag, but as Gunnar's glove cleared and hit the first few frames of tag, Adell's foot was already on the bag. Seems like a reasonable assumption that foot met the bag while blocked from camera view pre-tag, but because in those frames, the foot wasn't visible, they called it inconclusive. I guess if you have object permanency, you don't qualify to be a replay umpire.