Had SD for just over year, full subscription, having tried the 30 day trial in 2012 to Corsica (and back) Just superb
Just before setting out on the 2013 flight (7th June to 15th June, around europe, PA28) I updated to version 2.7.0 on Ipad 2.
All was great, planning the whole route, plates, airport info from the AIP's. you name it. So to get to the subject of freezes.
Routing from Gdansk to Krakow with most of the leg complete, the aircraft symbol jumps abruptly to the left and logging stops. Restarting SD on the "Home Button" several times produced a tracking 180 degrees out. Rebooted Ipad and situation normal, so the last 40 miles no problem. Just as well, as the weather was in a grumpy mood
Later in the week I had several "freezes" and the only way to recover seems be to reboot the Ipad, sometimes twice or more. The freezing seems to occur in concentrated batches ( once I had five in short order) but once you achieve an Ipad reboot, things settle down. I do not recall there being a "lost satellite reception" warning.
As this is the first time I have encountered this problem, I thought it might be just ver 2.7.0 but it looks not, from earlier posts. At the moment I am not sure if it is a SD or Ipad problem
Since then, no repeat of the problem, but flying somewhat less hours at the moment.
PS , I do operate a Garmin 296 just in case, but not in the same class as SD