Changing frequency solved interference on 5180mhz

From beginning of my adventure with OHD I always have 5180mhz as default freq, but on a specific location, near town, there was always interference. Changed the freq to 5240mhz solved it, had a nice flight up to 10k.
Plane used was Mini Talon, a+ pi with zero camera, Asus ac-56, servo gimbal pan/tilt, maple leaf antenna.
Groundpi 3b+, Asus with diy double biquad / Ghettostation tracker.
RC with frsky r9m / r9mm at 868mhz.