Sims multitasking eating with robotics table

The sim was eating and I queued up a robotics table interaction for him, "Create Mechanism". He initiated creation of the mechanism while still holding his plate of food and eating. The "Create Mechanism" task continued to show up in his queue. Once he was done eating, the "Create Mechanism" task remained in his queue, but he walked away from the table and began to clean his plate. I had to cancel the original "Create Mechanism" task and tell him to resume it.