Memory Leakage and Sprite Disappearing and Very Slow FPS

What steps will reproduce the problem?
1. Making more Objects.
2. Clicking an object
3. Clearing Vertex Buffer

What is the expected output? What do you see instead?
Fps between 20-30
No sprite Disappearance.
No Memory Leakage

What version of the product are you using? On what operating system?
Android 2.2 Xperia X10. APILevel 8. Latest AndEngine till now.

Please provide any additional information below.
Basically I am trying to make a fruit slice type game. In which I have to cut 
the fruits. So when I cut the fruits one of them disappears. I don't know why 
it is happening. And as soon I keep on playing game for 5 10 min the FPS drops 
to nearly 5 4 3 2 1. And this problem is occurred when I cleared the vertex 
buffer to free the memory. I don't use vertex there isn't any disappearance of 
fruits. But very slow FPS and Memory issues. 
Wat is the solution?

Original issue reported on code.google.com by jawa...@gmail.com on 28 Nov 2011 at 6:08

emeric636 / andengine

Memory Leakage and Sprite Disappearing and Very Slow FPS #58