Title: Sony X-OCN (Burano) looks flatter in Beta than in Premiere 2026 with identical color management settings

Hi,

The same Sony Burano X-OCN LT clip (.mxf, S-Log3 / S-Gamut3.Cine) looks noticeably flatter in Premiere (Beta) than in Premiere Pro 2026: lifted blacks, lower contrast and less saturation. All the color management settings are identical in both versions.

Versions

• Premiere Pro 2026:
• Premiere (Beta)
• macOS 

Settings (identical in both)

• Color Manage Auto Detected Log and Raw Media: ON
• Source Clip: Use Media Color Space → Sony S-Log3/S-Gamut3.Cine
• Input LUT: None, Preserve RGB: OFF
• Sequence Color Setup: Direct Rec. 709 (SDR), Output: Rec. 709
• Sequence Clip: S-Log3/S-Gamut3.Cine → Rec. 709, Luminance Preserving gamut compression, Hue Preservation tone mapping, Highlight Saturation 0.5
• Display Color Management: OFF in both
• No effects applied, Source Settings unavailable (greyed out) in both

Steps to reproduce

1. Create a new project in both versions.
2. Import the same X-OCN LT clip.
3. Create a sequence from the clip.
4. Compare the Program Monitor.

Expected: same result as Premiere Pro 2026.
Actual: the Beta image looks flatter and less saturated.

Screenshots of both versions are attached. Is this a known change in how the Beta handles X-OCN, or a bug?

Thanks!