I only get this animation bug twice and I don't exactly know how. here is what I remember. unfortunately I recorded both times but a really rare shadowplay bug destroyed both records...
- Legacy ID
use new UI
carry two main weapons
got to a water pump and use canteen, empty it and fill it up again.
drag the canteen from handslot to inventory and pick up your second weapon in handslot
jump over a fence (somewhere between some seconds to 1 minute after the water pump)
now, when it happens you will see:
your character jump
he goes to the suicide animation
he lays down to the ground
he stands up again
now you can run again