Last month, it was revealed that this year's new MacBook series products had USB 2.0 device connection problems. At that time, outsiders speculated that it was because MacBook recognized USB 2.0 devices as USB 1.1 devices. However, there was no real solution before. And now after the launch of macOS Catalina 10.15.6, it seems to have completely solved this problem.
In the 10.15.6 update, Apple wrote: "Resolved the problem that some USB mice and trackpads may be disconnected." Although the product in question is not just a mouse and trackpad, this update It seems that all USB 2.0 device connection problems are also fixed.