Hi,
since the update, the maps site is broken in regards, that after some time, suddenly all found caches are shown as unfound.
It's quite easy to reproduce:
- Go to the maps site with your home coordinates as start point
- Hide all found and your own caches by selecting the check boxes
- zoom out 2-3 levels, move around
- click on the "hand" in the left top circle ("back to last result")
Now all caches are shown as unfound. There are quite some more ways to get this effect, but this is the most reliable way to reproduce.