I apparently managed to screw up the end game graphics while preparing the 2.2 release, which Trurl brought to my attention. Sorry folks!

What’s New in v2.2.1

• Fixed graphics corruption and potential crash during ending.

For older changes see the full changelog.

Download & Source Code

• You can download the game from its CSDb entry: Ultima IV Remastered v2.2.1.
• The source code is available on GitHub.