Description

System

• Device: Lenovo Legion Go S
• OS: SteamOS 3.8.11 (official Lenovo image)
• Proton: GE-Proton 11-1
• Game: Steam version of Final Fantasy XVI Steam App ID 2515020

Problem
Certain pre-rendered cutscenes intermittently display a black screen while the audio continues normally. Gameplay is unaffected, and skipping the cutscene allows the game to continue normally.

The issue did not exist until a few days ago.

One reproducible location is during the Bahamut attack on the capital. Earlier cutscenes played correctly.

Troubleshooting performed

• Verified game files.
• Deleted and rebuilt Proton compatibility data (compatdata).
• Game installed on internal SSD.
• No Decky Loader plugins.
• No OptiScaler.
• No Lossless Scaling.
• No frame generation.
• No mods.
• Fresh GE-Proton prefix created.
• Audio continues normally while video remains black.
• Gameplay immediately resumes after skipping the cutscene.

Expected behavior
Pre-rendered cutscenes should display normally.

Actual behavior
Audio plays, but the screen remains black until the cutscene is skipped or ends.