Placing down shulker box breaks game by showing the placed down box as lead instead of the box, which also disables the ability to open your inventory, and disables interactions with chests, furnaces, crafting tables, etc. It also turns stone into glass panes.

Gameclip I recorded but is too big to attach: https://gameclipscontent-d2001.xboxlive.com/xuid-2535430595284891-private/6bfea70a-554f-4634-af9d-7dacd6219ecf.MP4?sv=2015-12-11&sr=b&si=DefaultAccess&sig=ez0VspGqSsWPaUkK8youJ0T9yRrovx23gcnx3oEOxto%3D&__gda__=1628882334_5bff2d7cd16b915175d65e889b5a7b5e