The option that could interrupt a sentence in between the subject and the verb is prepositional phrases.
For example, in the sentence "The cat on the roof is meowing," the prepositional phrase "on the roof" interrupts the order of the subject ("The cat") and the verb ("is meowing").
Inverted order can change the arrangement of the sentence but typically doesn't interrupt between the subject and verb in the same way. Indefinite pronouns and independent clauses also do not conventionally cause interruptions between the subject and the verb.