Fields don't always split

[Happy_Camper_Pi]

I am using ZZbots to populate Airtable from a Google Sheet but I am having 2 behaviors:
a pizzas field contains the list of pizzas for a given event. This field is populated wih up to 8 pizzas recipes that are comma separated
Behavior 1: Airtable picks up the list an automatically split each pizza and link it to the correct linked pizza recipe from another table
Behavior 2: Airtable does not split each pizza and considers the whole pizza list as a single recipe

Any clue what’s going on?