A fellow developer shared a Weibo post (https://weibo.com/1808884742/IApbpEVQr) where blogger @王波粒 noticed a peculiar phenomenon on the Mate 30 Pro. I highly recommend watching the video first.

The video’s description and some of the comments aren’t quite technically accurate. Here’s a summary of what’s actually happening: On Huawei phones, the Weibo app continues to load images smoothly while scrolling the main feed. However, the exact same version of the Weibo client on other phones waits until scrolling completely stops before it begins loading images.

This post looks at this phenomenon from a technical perspective, explores why it happens, and discusses what we can learn from it.