The bug

In 1.20.2 pre-release 1, the map icons denoting ocean monument and woodland mansion locations on explorer maps were retextured. The older iterations are not available in Programmer Art, however, despite them originating in 1.11, a version predating the Texture Update's 2017 announcement.

How to reproduce

1. Obtain a woodland explorer map or ocean explorer map
2. Enable the Programmer Art resource pack
3. Observe

Expected results

The icons shown would be those seen in 23w35a and earlier with Programmer Art active.

Actual results

The new, updated icons are used instead even though they should not be.

How to fix

Incredibly easy to fix, just add a new directory to the Programmer Art resource pack containing these two files (extracted from map_icons.png via Slicer):

ocean_monument.png:

woodland_mansion.png: