It's actually possible to destroy a locked chest with an axe. After destroying it, it'll turn into a normal chest without the datatag.
MC-44494
Destroying locked chests is possible
Resolved
Duplicate
0
Duplicate of MC-44362 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.