NPCs just standing and idling by rather than walking to the quest-related location

[leron9999]

Hello! I recently started playing the Winterhold quests and I encountered two things:

1. Faralda doesn't move with me along the bridge to light the fires and just idles around her usual spot by the college entrance
2. On a reload, Faralda SOMETIMES casts light on the bridge, but never moves or walks away from her location
3. Upon starting the Sarthaal quest, Tofldir and the other students just stop by the door after exiting the Hall of the Elements and stay there

Any help would be much appreciated.

 

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