You are not alone 
: GPS fix takes very long after update (with e.g. Mapy.cz and GPSTest) (that topic is about FPOS, but the problem might still have the same root cause)
Edit: Should have looked more closely, you are talking about FP3 here, sorry, my bad 
If I remember correctly, that features needs a location to get the proper times for sunset / sunrise, so likely related to your first issue.