I am having the same problem.
IPhone 10xs
USB cable to Dell laptop with Windows 10
Using Photos App
Click Import - Select from a USB device
Select Apple iPhone
2502 photos are discovered.
Select Box: NONE (default option) with 0 of 2502 items selected
Any attempt to change that selection to "Items since last import" crashes the app.
Interesting note, at the bottom of the Photos app is a blue box that says "Import 5 of 2502 items". When I selected that last time, it did not import any.
Hoping this problem will be fixed. I have always imported via USB with the Items since Last import as the default option.