Infant stretching when caregiver intends to pick them up

I can take many more screenshots, and include some from my daughter on her game upon request. (we have different exp packs)
Infant turns into a stretch armstrong when a caregiver picks them up. I have only seen this with controlled sims, not with NPC babysitters. It doesn't seem to be 100% of the time, only when the infant "needs" to readjust by scooting, but this only kicks in after I've assigned the teen/YA to do an interaction involving picking the infant up from the ground. 
The one next to the crib, the infant was asleep before I had to exit to repair my game because his twin's milestones were stuck again. Loaded back in and he was sitting next to the crib. Queue stretch...and long pause for the game to figure itself out before the teen I assigned to pick him up started moving.