Interactions disappear from queue without reason

I am getting this very frequently, approx every few interactions. 

I have noticed a few things: 

1) sim often loose their queue items when near stairs/need to go upstairs or down to complete said actions

2) sims are sometimes teleported outside the home and reset (where they usually return from work) 

3) I can confirm that when emotions change it can trigger it, but not always. 

4) Also can confirm it happened often when switching between sims in a household.