The highly successful R&B Tour featuring Chris Brown and Usher has been hit with another dramatic twist after one of the superstars’ upcoming Los Angeles-area concerts was canceled amid reports of continuing tension behind the scenes.

The pair were scheduled to perform at SoFi Stadium in Inglewood, California, on Monday, November 16, but Ticketmaster now lists the event as canceled and says refunds will be issued to ticket buyers through their original payment method.

The cancellation comes just days after reports of a backstage disagreement between Chris Brown and Usher during their November 5 concert at Mercedes-Benz Stadium in Atlanta.

According to TMZ, tension reportedly erupted over when the Atlanta concert should begin as heavy traffic and road closures delayed the arrival of some fans. Usher reportedly favored starting the show, while Brown allegedly wanted to wait longer so more concertgoers could get inside. The performance eventually began significantly later than expected.

Sources later told the outlet that the two R&B heavyweights had yet to fully resolve their differences, describing their relationship as “still icy.” However, there has been no official confirmation that the reported disagreement caused the November 16 cancellation.

Brown has also appeared to push back against some of the online speculation surrounding his relationship with Usher, posting “Internet cap. Don’t fall for it” on social media following the initial reports.

Despite the canceled November 16 date, their November 15 performance at SoFi Stadium remains scheduled as of November 10.

The development is certain to fuel further questions among fans about what is happening behind the scenes of one of the year’s biggest R&B tours. Until either Usher or Chris Brown publicly addresses the situation in detail, however, speculation over the reported backstage feud remains just that—speculation.