GPS issues.

 https://www.icao.int/sites/default/files/APAC/Meetings/2025/2025%20ICAO%20APAC%20Radio%20Navigation%20Symposium%20%20Radio%20N/6-Addressing%20GNSS%20RFI-Challenges/SP04-GNSS-RFI-in-India-Challenges-Regulations-and-Analysis-thereof.pdf