While you're inside of any kind of door, if you press shift you can't crouch. Same thing happens when you try to shift out, stand up.
Environment
Windows 10, Java Version 8
MC-194208
Cannot crouch while inside of door
Resolved
Duplicate
0
Hi there!
This looks like a duplicate of MC-166903. This is an intentional feature, and you shouldn't expect it to be patched as a bug. You can suggest a change to this on the feedback website at https://feedback.minecraft.net/hc/en-us.