seeing only outher players and chests and seeing through walls

i would normaly play holding a 1.7 item

i was playing i held a item in my hand or play for a while and i would be able to see through walls and only see chests and players players

Steps to Reproduce:
1. play on a server online or offline
2. ... get a poppy a stained galss pain or play for about 10 minuits
3. ... hold the item in you hand and the bug will apear