End to end encryption data not syncing

Like many others on this block I’m getting this message repeatedly on both my iPhone and iPad. It started with the latest update. Clicking on the “resume data syncing” button I’m prompted to reenter my password. That done the message disappears and all seems well - UNTIL- I restart the device. Nothing seems to have worked to eliminate the issue and I am NOT going to go through wiping the devices and starting over. I believe this is a problem with apple's latest update. So, Apple, when are you going to address this issue?