I'm currently building my own house here on this server in my island.
I had two grass blocks to buy some grass but they disappeared.
I went to /warp trade and exited the game.
When I re-logged, my grass blocks had disappeared.

~Rield1

 

Have you tried clicking the slots, the grass was in? If need be I can personally refund you.

 

THERield1 Anything on this? c:

 

^