Some answers on this site say that Draupadi did agni-pravesha before meeting each husband. Those answers don't provide any citations from the Mahabharata.
Regardless, this is contrary to what is normally said of Draupadi being an exceptional case of polyandry. For example, in this section of the Mahabharata, Yudhishthira justifies his marriage of Draupadi by citing previous examples of polyandry, as well as following polyandry on the order of his mother:
"Yudhishthira then spoke, saying, 'My tongue never uttereth an untruth and my heart never inclineth to what is sinful. When my heart approveth of it, it can never be sinful. I have heard in the Purana that a lady of name Jatila, the foremost of all virtuous women belonging to the race of Gotama had married seven Rishis. So also an ascetic's daughter, born of a tree, had in former times united herself in marriage with ten brothers all bearing the same name of Prachetas and who were all of souls exalted by asceticism. O foremost of all that are acquainted with the rules of morality, it is said that obedience to superior is ever meritorious. Amongst all superiors, it is well-known that the mother is the foremost. Even she hath commanded us to enjoy Draupadi as we do anything obtained as alms. It is for this, O best of Brahmanas, that I regard the (proposed) act as virtuous.'
Pandu in the Mahabharata even says that polyandry was permitted at one time.
Does the Mahabharata actually say that she did agni-pravesha before meeting each husband every year?