FFS - NC Machine with Multiple Variants and Parallel Operation (LH/RH)

We are coming across real scenario where assembly line is having 3 variants and, on each station, there is LH&RH operation (Runs in Parallel). Sample model is attached here. If we run this model with 1 variant and with command "Create Common Input Group" it is running perfectly. But same thing is not working with more variants. Any Leads? Thanks in Advance