attached video - more than one unstackable item cannot be out into a bundle
the same happens with more than one stack of 16 of enderpearls/snowballs
Environment
Minecraft 20w45a - vanilla Java 8
MC-203593
Bundles cannot hold more than one non-stackable item in a bundle
Resolved
Works As Intended
0
This is intended. It's described that way in the changelog.