iMessages on my MacBookPro are not displaying recent threads seen on iPhone.
For the past two weeks, iMessages on my MacBookPro are not displaying recent threads seen on iPhone. My iPhone sends and receives all texts fine. But seemingly randomly, my MacBookPro is only showing about 20% of the active threads. Also, some texts generated on my MacBookPro get kicked back, saying "Not Delivered."
Have tried powercycling, "resetting" (turning off and on iMessage Forwarding), "waking up" unresponsive threads, and other ideas, but nothing's working. A similar issue happened a year or so ago, but that was with an older MacBookPro. This one's eight months old, Ventura OS. (my iPhone XR is ~2019, iOS 16.6.1).
MacBook Pro 14″, macOS 13.0