[41.71] Wall decorations disappear on upgrading wall

[Big G]

• 41.71
• Singleplayer
• Mods: Chip stones with hammers; Filibuster Rhymes Used Cars; Out the window v0.0.6; Pillow's Random Spawns; Safer prop moving; Tidy up Meister; Time to cook; Trueactions 1.08; Tsar's common library 1.29; vehicle scenes; Turk's lasting jarred foodstuffs
• Reproduction steps:

1. Build a lvl 2 wall,
2. hang mirror on the wall,
3. upgrade to lvl 3 wall.
4. mirror disappears.