The fix for MCPE-65391 was handled improperly.
You can mix all regular planks when crafting a chest, but cannot mix any of the nether planks. This applies to ALL new recipes added in this beta.
[media][media]
How to reproduce
Use a mix of oak and birch planks to make a chest
→ ✔ It worksUse a mix of oak and crimson planks to make a chest
→ ❌ It doesn't work
Suggested fix
Do what Java added back in 2017 to solve this very problem:
Allow multiple items for a single key
Add custom block/item tags (groups)
Due to the nature of the way these blocks are implemented in Bedrock, this is not going to be a quick fix. We might need to track the stone crafting recipes separately from the plank types, too.