While not quite chaos, I have noticed a change or perhaps a difference in the behaviour of LR's Grid display of images after import.
I've used a D800E for years now, and after import, all images are displayed in the order they were captured. To be honest, I never thought to look to the bottom panel to see if the sort order was set to "Add Order" or "Capture Order".
For some months now, I've been using an RX10iii and notice that after import, the images are in a random order as a few people are describing on this Forum. I've not changed my routine or settings at all; it seems LRs default sort order is "Add Order" rather than capture order, not even alpha-numeric order by file name, which is even stranger as that's the default on all (most?) file systems. It seems that from the RX10iii card, images are imported at slightly different times as described on another thread.
It's not a problem to select "Capture Order", it's just odd that it is default. It's also odd that the files from two different cameras would be in a different order after the identical import steps.j