27.8 - On-device remove tool is much slower than cloud

The on-device Remove Tool is consistently slower than Cloud Remove on an Apple M1 Pro (32 GB RAM). The slowdown becomes severe when removing multiple small objects such as electrical outlets. 
 

System

• MacBook Pro M1 Pro
• 32 GB RAM
• macOS Tahoe 26.5.2
• Photoshop 27.8.0
• Native Apple Silicon
• GPU acceleration enabled

Example

• One outlet:
  • Cloud: ~6 seconds
  • Device: ~15 seconds
• Eight outlets:
  • Device processing takes several minutes.

Even on a blank 2000×2000 document with a simple black rectangle, Device Remove takes around 10-20 seconds.

I have already:

• Reset Photoshop preferences.
• Reinstalled the AI model.
• Tested newest Photoshop Beta and rolled back to 27.7- neither affected the issue
• Verified GPU acceleration is enabled.
• Confirmed Photoshop is running natively on Apple Silicon.