I'm in the annoying position of actually being able to blame my GPS. Not my navigation app, the actual GPS signal. My incompetent government, as you might have heard on the news in the past year, has decided to provoke every other country in the region (and plenty more elsewhere) into a regional war. So now in "self defense" from guided missiles, they are constantly jamming GPS signals in my city and some other areas of the country. My GPS has been telling me for months that I'm in Beirut.
Somehow this precaution isn't necessary in Tel Aviv though? Curious....
The situation on the ground is actually not as bad as that. I think most of the jamming affects aircraft a lot worse than grounded devices. Still, in Haifa (city in the northern half of Israel) even on the ground you can almost never get a good signal of your actual position.