Let me bring you up to speed.
https://spacenews.com/army-looks-for-alternatives-to-gps-as-enemies-threaten-to-jam-signals/
“ Army looks for alternatives to GPS as enemies threaten to jam signals
Gen. Murray: “We have to have multiple ways of getting PNT in the future battlefield because of the threat of jamming.”
Sandra Erwin
October 14, 2019”
Yes Johnny, our DOD has been aware of GPS jamming for awhile. You can do your own research as to what PNT systems are.
GPS jamming attempts go back 20 years or more.
This is not a new thing. The question is whether it is a substantial problem now.