The bug

For some log and wood types the stripped and non-stripped variants have the same map color despite looking differently.
Other (non-affected) types (e.g. birch) have different colors.

Expected: Usually the stripped variant has the same color as the (non-stripped) vertical log variant.

Affected types

• dark oak log and wood (see also MC-219465)
  Fix note: Usually stripped logs / wood use the same map color as the vertical (non-stripped) log variant; however for dark oak the colors differ a lot so this might not be an option here (it would therefore also require different handling for stripped horizontal vs. stripped vertical log then).
• crimson stem and hyphae
• warped stem and hyphae

How to reproduce

1. /fill ~1 ~ ~1 ~6 ~ ~6 minecraft:warped_hyphae
   

2. /fill ~7 ~ ~7 ~12 ~ ~12 minecraft:stripped_warped_hyphae
   

3. Create a map
   The blocks have the same colors on the map despite them having different top textures