I planned a trip to Lundy Island on the 22nd May and had some disturbing issues with SkyDemon navigation. All went well up to my first waypoint but I got an incorrect time update to the next waypoint. The times continued to be wildly in error. The aeroplane symbol would occasionally bear no reference to my position or direction and I started to lose confidence in the data being produced. I made it as far as Lundy but, without a cloud break, was unable to land and did a 180 back to the mainland. At one point the aeroplane symbol darted 10 miles west and back again, recording the very track. Diverting to Dunkeswell, my track position was all over the place and a planned downwind approach to 17 LH just disappeared off the tablet and I had to redo it to get the image back again. Returning to Lymington from Dunkeswell saw similar time misreporting. Does anyone have a similar story or any advice on how to proceed? Thanks in advance, James.