FFVI: Divergent Paths

Could be Mog's actor is holding onto a setting to not animate while walking, simultaneously coupled with a pose that is not supported. If it happened when you recruited Umaro, it could be damage to the event that causes Mog to move up next to the Sasquatch and bop 'im.

EDIT:
Could be as simple as switching these two lines.

Code:

CCD79A: {3D-0F}               Create object $0F
CCD79C: {40-0F-0F}            Assign properties $0F to character $0F (Actor in slot 15)

In the vanilla version of the event, the properties are assigned first. Everything else in the event seems to be vanilla... so maybe it's an entrance trigger thing?