Reloading collectionview does not maintain content offset

**Describe the bug**
When `reloadData()` is called, the `collectionView` sometimes doesn't preserve the scrolling position, causing the collectionView to jump abruptly

**To Reproduce**
Steps to reproduce the behavior:
1. Open and run the stock example project (workspacce) under `MagazineLayoutExample`
2. Please see the attached gif to reproduce this issue
Note: this doesn't occur every time, you need to adjust scrolling position before reloading the data if you cannot reproduce it at the beginning

**Expected behavior**
The screen should maintain its position after reloading data

**Screenshots**


**Smartphone (please complete the following information):**
- Simulator: iPhone 11 Pro Max
- OS: iOS 13.0
- Version: current

**Additional context**
Not sure if this could be a bug in UICollectionView rather than MagazineLayout, please advise.