Title: Historic Deck Editor Freezes When Canopy Lands Are Included (After Today's Update)

Platform: MTG Arena (Windows)

Description:

After today's update, Historic decks containing any Modern Horizons 1 canopy land cannot be opened in the deck editor.

The deck can still be used to play matches normally, but attempting to edit the deck causes the editor to become stuck on "Waiting for Server."

Steps to Reproduce:

1. Create or open a Historic deck.
2. Include a canopy land such as Fiery Islet, Sunbaked Canyon, or Waterlogged Grove.
3. Save the deck.
4. Attempt to open the deck in the deck editor.

Expected Result:
The deck opens normally and can be edited.

Actual Result:
The deck editor gets stuck on "Waiting for Server."

Additional Information:

• Started immediately after today's update.
• 100% reproducible.
• Occurs with multiple canopy lands, not just one specific card.
• Matches can still be played normally.