Loss of data

Just one issue (if it's one or maybe a normal behavior). Some time on GPS record, my phone loss satelite signal. So the recorder (GPS Logger Android) draw a strait line when it finds signal again. So here is the problem : when I add points folowing the right road to fix the line, when I save and open in GpxPod all datas of speed, time, elevation of originals points are gone. I just have the path used.

Not having the elevation of my added points is normal but the points untouched should remain. The time and space informations of stating and ending point are not change (so is the distance traveled)

Is this behavior (loss) normal ? I can share my original and edited .gpx