Chest boats use a unique smaller chest model when placed in the world. This is inconsistent with chest minecarts, which use a shrunken version of the normal chest model.
MC-260597
Chest Minecart and Chest Boat Model Inconsistency
Resolved
Works As Intended
5
(Unassigned)
Community Consensus
Textures and models
1.19.4 Pre-release 1, 1.19.4, 23w14a
Retrieved
Can confirm in 1.19.4-rc2.
Boat with Chest used 12*12 pixel model, Minecart with Chest used 14*14 pixel model.