Image Assets (Generator) fails to export JPEG, but WebP works fine (Regression)

Hi everyone,

I'm reporting a regression bug in the latest two builds of Photoshop Beta on macOS. The Image Assets (Generator) feature has stopped generating JPEG files, while WebP remains functional. This works perfectly in the Stable version of Photoshop.

The Issue: When naming layers to export multiple formats, only the WebP files are generated. Even a single JPEG export command fails.

Test Cases & Results:

• 02.jpg7, 02.webp8 — Result: Only .webp generated. (.jpg is missing)

• 02.jpg7, 02_web.webp8 — Result: Only .webp generated.

• 04.webp7, 02.webp8 — Result: Both .webp files generated. (Confirms comma-separation logic is working)

• 02.jpg7 — Result: No file generated at all.

Troubleshooting performed:

1. Confirmed the same file works as expected in the Photoshop Stable version.

2. Tried creating a generator.js configuration file in the user root directory to force JPEG support, but it was ignored by the Beta build.

3. Reset Generator cache and preferences.

4. Verified document is in RGB 8-bit mode.

It seems the JPEG encoder module within the Generator (Node.js) engine is either crashing or not being triggered in these recent Beta builds.

System Info:

• Photoshop Beta Version: [27.5.0]

• Photoshop Version: [27.4.0]

• OS: macOS [26.4 Beta]

Is anyone else experiencing this? Any help from the dev team would be appreciated.