In inventory, trapped chest appears with the texturepack skin. Once placed, it reverts to the default texture, potentially giving away the position of a trapped chest to someone who is using a texturepack (not tested online).
MC-10299
Trapped Chest default texture overrides custom texturepack
Resolved
Invalid
1
The trapped chest model is simply missing in your texture pack.
See screenshots, default texture pack and Misa's 64x V4.3.4