Hey guys, I've updated my iPad Pro 2018 to iPadOS15.4 beta 3 and my MacBook Air to macOS Monterey 12.3 beta 3.  The Universal Control works for cross-device trackpad and keyboard. But I can't drag and drop files between these two devices. When I drag a photo from my MacBook to iPad, I can actually see the file icon appear on the verge of iPad screen but it will soon disappear. And when I try to do the other way around, the Mac doesn't even show anything. So I'm wondering whether it's a bug or it's due to my settings?  Have anyone experienced this problem yet?