Why am I showing business income from New Jersey when my business is solely carried out in other states?

We are married filing jointly for 2019. We are full time residents of NY. I have a self-employment business that exclusively earns 1099 income from CT. My wife has a separate self-employment business that exclusively earns 1099 income from NY.

While filing New Jersey non resident state tax, it is showing taxable income on both of our self-employment business although none of our 1099 income is from NJ.

Is this normal? Shouldn't it have no taxable business income for New Jersey if our self employment 1099 income was exclusively earned from NY and CT?