Scans are the general exception, because they're generally not raw files - and if they're not raw files, then you can edit those originals at any time in PS and then edit in LR without losing anything.
It's particularly the catalog and its related files that needs to be local and fully synced before switching machines. The photos themselves are only needed locally when you need to access an original.
Yes, prbimages seems to have it right. In 9.2, you get a choice of what to use for the defaults in preferences. In earlier versions, the Nikon Z6 writes its own settings to the files and Lightroom reads them, but you were probably applying a preset on import that was overriding it, or something...
Hi natc, welcome to the forum! I don't suppose you did an iOS update around then? I suspect it's an iOS change rather than a Lightroom one, but I could be wrong. Any particular reason you wouldn't send drop them all into Lightroom?
Hi Amnon, welcome to the forum!
A couple of people have reported it but it's rare. It would be worth adding your comments to the bug report: Lightroom Classic: Refreshing crop view on secondary display | Photoshop Family Customer Community
You unstacked them? Or you just expanded all of the stacks? If you unstacked them, auto stack by capture time set to 0 seconds should get you pretty close, and maybe next time just expand all of the stacks.
FWIW, I'd do these the other way round if you're starting with a raw file. Lightroom first and then Photoshop as a final step. The reason being, the raw file has a lot more data for Lightroom to work with, so you'll get a better result editing the raw file than the PS'd TIFF/PSD.
Your memory is tricking you on this one - the checkboxes didn't exist until recently, when they added multiple exports. Rather than trying to check it, you just want to click on the name to select the preset.
As long as the OneDrive files are actually synced down to the local hard drive on each machine, and you give them time to fully sync before switching computers, then yes. However I would do more frequent catalog backups, as there's a higher chance of catalog corruption.
How long ago did you do the Rebuild Sync Data? That would be my first port of call, but it sounds like you've already done that recently. Was it stuck at the same number before you rebuilt? And are all of the photos accessible in Lightroom (e.g. not marked as missing)? And there's no firewall...