ASCollectionView does not maintain scroll position when loading new batch on top

[andrei1152]

Describe the bug When inserting new data after scrolling to top, ASCollectionView refreshes the data and scrolls to the (new)top, instead of maintaining current scroll position.

To Reproduce

ASCollectionView(data: viewModel.messages) { (message, _) in
    MessageView(message: message, containerWidth: reader.size.width)
}
.layout { _ in .list(spacing: 10)}
.scrollPositionSetter($scrollPosition)
.onReachedBoundary({ (boundary) in
    if boundary == .top { viewModel.fetchMessages() }
})

viewModel.fetchMessages() looks something like this

func fetchMessages() {
    DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
        self.messages.insert(contentsOf: newDataBatch, at: 0)
    }
}

Expected behaviour What I'm trying is to implement something similar to a chat like functionality, where you start at the bottom and scroll upwards until you reach the top, then load a new batch of data, then scroll some more, and so on. I expect that scrolling remains where I left off after loading the new batch of data. Instead I get scrolled to the top of the newly fetched data.