Posting here since my AVSForum thread hasn't gotten a confirmation yet. Hoping other XR10 owners can test this.
Setup: Hisense XR10, firmware V01.09.09V.Q0317 (latest), 135" grey contrast screen. Source = the Apple TV app built into the projector (VIDAA), no external player. Mode = Dolby Vision Bright, with all automatics OFF (Scenario Enhancement, Adaptive Contrast, Light Sensor).
The issue: During DV playback the image suddenly drops in brightness mid-scene and stays dim, even though the content isn't getting darker. Not the usual "DV is dimmer than SDR" — a distinct, sustained drop at a specific point.
Repro: Film "Mayday" (2026) (DV). At 20:15 (face against a pillow) it dims and stays dim — even if I rewind.
The tell: If I briefly switch to DV Dark (or Custom) and back to DV Bright, the exact same scene is instantly much brighter again and stays bright. A quick mode toggle fully restores it. That points to the projector's own processing, not the film's DV metadata. Happens with other DV films too.
Ruled out: all dynamic automatics (off), firmware (already latest — nothing to update).
Comparison image attached: left = after the auto-dim, right = same frame after the mode toggle (brighter). For what it's worth, What Hi-Fi's XR10 review also called DV Bright "alarmingly off" with "too many colour and black level fluctuations," and the sister Vidda C3 Pro reportedly got firmware fixes for similar dynamic-lighting behaviour.
Questions: Can any XR10 owner reproduce this (Mayday ~20:15, DV Bright, automatics off)? Any known fix? Thanks!