I'm encountering something similar to OP in #4305 where Android keep creating conflict for files modified from MacOS with Obsidian.

Behavior

• Use Obisidian to manage note on MacOS (use markdown files)
• Obsidian modify a file
• MacOS Syncthing detect change file and sync it
• Android Syncthing get the changes but trigger a conflict
• MacOS Syncthing sync back the *.sync-conflict file
• the sync-conflict contains the previous version of the file
• Android hasn't been used to modify the file
• I also have a linux machine with syncthing, no issue there, never create conflict, happy with the updated file.

Unsuccessful workaround

• Disabled Watch for change on android
  • Sync conflict created on syncing from MacOS
• Pause the sync on android
  • Sync conflict created when unpaused

System Info

Android

Syncthing: v1.22.0-rc2
Hardware: Pixel 4a 5G
OS: Android 13 (No custom rom, default from Google).
Configuration: Watch for changes, Ignore Permissions

MacOS

Syncthing: v1.22.0-1
OS: MacOS 12.6
Hardware: Apple M1 Max 64Gb
Configuration: Watch for changes, Ignore Permissions

Linux

Syncthing: v1.22.0-1
OS: Debian 11
Hardware: armhf