Joined: Aug 2010
Posts: 12,728
Likes: 2,105
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
GPS satellite power is not very strong and the satellites are something like 12,000 miles up which is a pretty long way for the signal to travel. And a GPS receiver needs a pretty good antennae to pick up the signals. With GPS units that do not have a really good antennae I have often had poor reception under heavy tree cover and if there was a lot of rain clouds above. I would give it a few weeks of use before deciding if your phone has a problem.
If it reoccurs, you might want to see if there is a correlation to battery strength vs reception.