magento2 – Possible to combine configurations and custom options?

I am trying to import simple and configurable products that also have custom options.
But when I import these products my connection in the configurable product of the configurations are gone.

I already tried importing first all my products without the custom options.
And that works. When I try to import the custom options the custom options are added to the simple product but the connection between configurable and simple is broken again.

Am I missing a column or a setting or is this just standard Magento behaviour and is it just not possible?