Integration with conditional fields

Use case;

Field A - select list with two options (option1, option2)

Field B - Conditional Field, only shown when option1 is selected in Field A

Field C - Conditional Field, only shown when option2 is selected in Field A

Unique Field Settings - Field A, B and C are all checked and should validate as unique fields.

The problem.

Select 'option1' from "Field A", enter 'text' in "Field B" save.

create new node and repeat; Select 'option1' from "Field A", enter 'text' in "Field B" save.

The second time the node is saved rather than printing a validation error for "Field B"

Hoping for possible integration or workaround methods for using conditional fields together with unique field.