Roku shares fell more than 8% in after-hours trading Wednesday after reporting second-quarter earnings that beat expectations but showed a slowdown in streaming TV viewing and tight hardware margins.

The company said streaming hours decreased by 1 billion hours from the first quarter of 2021. In its shareholder letter, it also said “tight component supply conditions and shipping constraints” continued increasing costs faster than expected.

“In Q2, we insulated consumers from increased costs for Roku players, which resulted in Player gross margin turning negative in the quarter,” the letter says.

The company’s total net revenue grew 81% year-over-year in the quarter to $645 million.

This is developing.