Another example is Lincoln Co., Colorado (place ID=249). It cannot be called up in Identify by typing it into the place box (not under Filters, either). It can be called up in Explore, though, as with the previous example. This is another county name that repeats itself over a dozen times in various U.S. states. Not sure whether that is a contributing factor that causes this bug to occur.
Workaround is editing the URL by inserting the place ID manually:
https://www.inaturalist.org/observations/identify?place_id=249
Nonetheless, it is clearly a bug that should be fixed. I am sure there are other examples.