Intermittent thrust loss with T-Motor U8II-X series motors

Hello everyone! Has anyone experienced intermittent thrust loss or RPM drops with T-Motor U8II-X series motors? (as seen in the following video) This is quite evident from RCOU.CX plots in the flight log(timestamps: 25m 50s → 26m) that motor no.4 is not functioning properly.
Link to the video and log: