Lightroom Classic: Incorrectly Sorting Files in Grid View

Something had to change between when it worked and the failure occurring. Regardless of their faults, computers are predictable. My Win 10 Pro machine had an update last week but there wasn't any info about the effects. It did have to reboot. 

Adobe's update history website is broken (https://www.adobe.com/gr_en/downloads/updates.html) but I think there was a Camera Raw update last week. I have Adobe updates applied automatically so there was just a quick popup that didn't last long. 

I honestly don't know about the Windows update.  I wasn't aware of one.  Usually my computer will reboot at night when there is an update and I didn't see that happen.  Also, I don't know of any Lightroom updates.  Previously when there was one, I was aware of it.  I think I can safely rule out IOS updates.  I can take the Iphone pictures out of the equation and still have a problem with my D200 pictures sorting incorrectly.

If you have automatic updates on then you might not have noticed it, just a reboot applied it. Has there been a Lightroom update between working and failure? There was an iOS update last week, could that have done it? 

So many moving parts, makes problem isolation difficult. 

@bill_3305731 I wasn't aware of a Windows update but at any rate I've never had this problem before.  My "other camera" is an Iphone 8 and I've always been able to successfully merge the images with those of my Nikon D200.  Basically I use the Iphone to capture GPS location and sync this information to my D200 files.  If files are not in capture time order then I have a hard time associating an Iphone picture with a group of D200 pictures.

Just my experience. Periodically copying files into a folder will result in all the new files being at the top or bottom. Closing and reopening the folder fixes the problem. An update to Windows comes out and the problem goes away, last week it came back. I've seen the same pattern with Lightroom though I can't prove they are related. Did you have the problem before last week's Windows update? 

Probably a silly question but with 2 different cameras: do they both store the date in the same format and in the same location? Did you check the dates with something like EXIFTOOL to ensure they are properly formatted in the images? 

Bill, thanks for the suggestions.  I tried as you suggested but it didn't change anything.  I tried rebooting my computer but that didn't help either.

Did you find something documenting this as a Windows problem?

This is seriously messing up my workflow.  I import files from two different cameras and expect them to be merged and in order by capture date.  They are not.

I've seen slightly different versions of this and was always able to "fix" it by choosing a couple of different sequences and then going back to the desired one. If you are on Windows as I am, this is actually a Windows bug that comes and goes, came back with the last update.