Since last iPhone update, Mail is no long updating between different machines
In the last week Mail has quite syncing between machines. The mail is downloading fine but when I read or move mail on one machine it isn't being reflected on my other machines. I have an iPhone, iPad and three Macs. I noticed the problem soon after the last iPhone and iPad update (13.6.1)
I have tried turning off Mail from the iCloud settings on the iPhone and turned the phone off and on before turning it back on. I also did the same thing on one of my computers.
iMac with Retina 5K display, macOS 10.15