Lightroom Classic creates .acr files when exporting JPEG as “Original”

Since the latest Lightroom Classic update, I’m experiencing a bug when exporting files.

Workflow:
1. Open catalog with DNG files edited by a collaborator
2. Save metadata (Cmd/Ctrl + S)
3. Export JPEGs in high resolution to the same folder
4. Use “Export → Format: Original” to copy those JPEGs to a new external folder (not added to catalog)

Issue:
In this last step, Lightroom randomly generates .acr sidecar files for some images in the destination folder.

Important:
- This did NOT happen before the update
- Source folder does NOT contain any .acr files
- It only happens when using “Format: Original”
- It does NOT happen when exporting JPEG normally (low resolution or re-encoded)
- It only affects some files, not all

This seems related to metadata writing or sidecar handling.

System:
- Lightroom Classic version: 15.3
- OS: Mac 26.3.1 (25D2128)