Two Madonna fans have now dropped their lawsuit complaining about delayed starts to her concerts, but the star’s lawyers are emphatic that the move was “not the result of any settlement” and are warning they might even seek penalties over the “frivolous” case.

In a motion filed in federal court Wednesday, lawyers for the aggrieved fans said they would permanently drop the case, in which they accused Madonna and Live Nation of breaking laws by making fans wait for hours at December concerts in Brooklyn on her Celebration Tour.

But later that same day, Madonna and Live Nation’s lawyers fired off a letter to the judge advising him that the move to drop the case had been made “unilaterally” by the other side — and that they had not reached any kind of agreement to end a case they say should never have been filed.

“Defendants believe that this action was a frivolous strike suit designed to force them to incur legal expenses,” the star’s lawyers write. “Plaintiffs have now abandoned this lawsuit when it became clear that this approach would not result in a settlement payment and that they would need to oppose defendants’ motion.”

The motion to dop the case said that each side would “bear its own fees and costs,” but Madonna’s lawyers said in their letter that they had never agreed to that – and that they might still demand that the plaintiffs repay the money they were forced to spend litigating the short-lived lawsuit.

“Given the legal expenses that defendants were forced to incur to defend this action … defendants reserve the right to move for sanctions, attorneys’ fees, and costs,” lawyers for Madonna and Live Nation write.

An attorney for the plaintiffs, Michael Fellows and Jason Alvarez, did not immediately return a request for comment on Thursday.

Madonna and Live Nation were first sued in January over the Brooklyn shows — a case that made headlines because it claimed the fans “had to get up early to go to work” the next day. She was later hit with a similar case in Washington, D.C. that claimed fans had waited in an “uncomfortably hot” arena and that she had lip-synched portions of the show. A third case, filed last month, echoed those claims but also alleged that Madonna’s show in Los Angeles had been unexpectedly “pornographic.”

All three cases have been filed as class actions, seeking to represent potentially thousands of other fans who also faced the alleged delays. By starting the concerts later than expected, the cases claim Madonna and Live Nation breached their contracts with fans and violated state consumer protection laws.

Madonna’s attorneys have strongly rejected those accusations. In a request to dismiss the New York case earlier this year, her lawyers argued that simply needing to wake up early was not the kind of “cognizable injury” that can form the basis for a lawsuit. And they say that anyone buying a concert ticket is well aware that a show likely won’t start at the exact time printed on the ticket.

“No reasonable concertgoer — and certainly no Madonna fan — would expect the headline act at a major arena concert to take the stage at the ticketed event time,” her legal team wrote in April.

While Wednesday’s dismissal means that the New York case is now closed, the DC and Los Angeles lawsuits remain pending.