"Congratulations! You have finished this deck for now" has no custom background

[RelyksZv]

Problem description

Hello! The main issue is that the background image works perfectly as intended, except for when I get to the completion screen that has "Congratulations! You have finished this deck for now."

I tried also resetting the addon itself to default settings (and making sure that the "Show in reviewer" is enabled, which still had the same issue.

I tried the checklist below; made the list and checked it twice.

Checklist

Please replace the space inside the brackets with an x if the following items apply:

• I've restarted Anki to see if it helps
• I've verified that I use the latest version of the add-on by redownloading it from AnkiWeb
• I've tried to disable other add-ons to see if there are any interactions present
• My issue disappears when I hold shift while starting Anki.
• I've checked if anyone else reported this problem before by looking through the issue reports. I also checked to see if there is a section about known issues in the add-on description, documentation, or README.

Version: [25.07.5]