Breaking grass has glitch image of sunflower briefly sometimes, grass drops DOUBLE TALLGRASS block sometimes, that can be replaced and broken multiple times until a seed drops from it, THEN the tall grass does NOT drop again ONLY the seed. The seed that drops eventually from this DOUBLE TALLGRASS block appears as a small black/purple cube, but DOES stack with regular seeds when picked up.
What I expected to happen was...:
When breaking grass, i expect to have a chance for a seed to drop. As of right now in 14w26c there is also a chance that grass can drop DOUBLE TALLGRASS Block which can be placed on dirt, and broken and picked up multiple times until the seed drops.
What actually happened was...:
When placing theDOUBLE TALLGRASS that is gathered from breaking grass, the tall grass has a small chance to drop a seed, which the seed looks like a black/purple cube, but DOES stack with regular seeds.
Describe what happened here
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... Break grass until a "Double Tallgrass" block drops.
3. ... Place tall grass block on the dirt.
4. ... KEEP breaking the tall grass block and placing it until the glitched seed drops.
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Comments

Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them.
And please use the search function in the future as all of the issues are reported multiple times.
Found this is regular survival, gathering seeds, and refined the bug to find out exactly what the heck was happening.