When holding shift (sneaking) one is not able to close trapdoors. You can place them but right clicking will do sweet bugger all.
MC-17032
Can't close trapdoors while sneaking
Resolved
Duplicate
0
Chris Warren
(Unassigned)
Unconfirmed
Snapshot 13w22a
Retrieved
Duplicate of MC-4196, please use the search function to see if your bug has already been submitted. Currently over 57% of tickets are being closed as duplicate.