Hi, I find a strange problem about OakMap.remove()

[fujian-zfj]

I don't quite understand why ctx.key.getSlice() is not released when OakMap.remove() is called, but only ctx.value.getSlice() is released. It is also because ctx.key.getSlice() is not released, the blocks are created one by one, and finally my process hangs because of outofmemory.