Losing wifi connection of raspberry pi 4
I'm working on a project in that I'm using raspberry pi 4 and gps + compass module ublox 7m.
And I connected a raspberry pi 4 with my mobile hotspot so I accessed the raspberry pi from my laptop.
Initially it is working fine, but after the completing the work, when I shutdown the raspberry pi 4, then pi doesn't connecting with the mobile hotspot, I tried power on and off, Even I add a switch to properly shutdown the pi 4, but that won't also work.
I have to boot the entire pendrive from the raspberry pi imager, after the complete fresh boot, it starts working,
But the same after some interval of time, it loses connection again, every time I tried wpa_supplicant.config suggestion but it didn't work also.
Until now the boot the pendrive at least 8 times, and done the code from the scratch.
If anyone from you guys have any suggestions please tell me I really need that now.