Non-static structures are so strong, so even players in spectator mode can't pass trough them!

Steps to reproduce in single-player:

1. Build a structure as shown below:
   
2. Make sure you set "Place only when anchor destroyed" mode on pulley
   
3. Pull it down a little bit
   
4. Switch into spectator mode and try to fly trough the wall.

EDIT: Found out, that you can (kind of) stay and climb on sides of these structures!

EDIT2: Throwables (snowballs, eggs, potions, crossbow rockets, ender pearls and eyes of ender) also doing strange things, when flying into the walls and even getting stuck on top of it!

Trident and arrows are passing straight through it.

Mod version 0.2.1, downloaded from Curseforge

This actually sounds kind-of useful for containing spectators if needed.

This actually sounds kind-of useful for containing spectators if needed.

Yeah, but isn't better to add special spectator barrier block instead of doing like this?

Yeah, but isn't better to add special spectator barrier block instead of doing like this?

True that

This issue has been addressed in 0.2.2a. Thanks for the report and feel free to re-open if need be.