Memory Leak

[fazal-e-majid]

Every time I select an image and send it to the next screen where I render it with a few filters in RenderView, the memory increases, specifically the Framebuffer. And when I come back to previous screen half of the memory is released.
I guess I should not have these objects in memory when I go back to previous screen but I've them in memory.
Please take a look at screenshot attached and let me know if this is just fine or there is some memory leak ? Thank You.