iPhone is not syncing its Playground saved images with the Macs

Yesterday updated to iOS 18.2 on iPhone 16 Pro and to Mac OS 15.2 on M2 MacBook Air and M4 Mac Mini, activated Apple Intelligence, and have been testing out the Image Playground. On all devices, iCloud settings are on for syncing Image Playground.

However, since this morning the iPhone is not syncing its Playground saved images with the Macs, even though the Macs sync with each other. I know the whole thing is in beta, but hoping there's a fix for this. I've tried turning iCloud syncing for Playground off and on on all devices, also leaving the phone's app open for extended periods, and no luck. All devices have active and robust network connection.

[Re-Titled by Moderator]