There is a bug with random conditions, which leads to loose all available TU for a selected girl when she start moving.
e.g.:
0. Select the girl and quick save.
1. A girl is sitting in a house with 90/90 TU.
2. I give an order to the girl to move outside. It will cost 26 TU.
3. She open a door and then just stopped. With 0 TU left.
4. So i load the quick save, do the same steps (1-3) and it work as intended, no anomaly drops for TU.
It's a pretty rare bug, but it's very annoying sometime