Herelink Failsafe

Hello. I have herelink and cube blue. Gps is good and Loiter mode on. Drone flies about 1.5km and then radio/video connection lost. Drone not return home. Remains in place. FS_OPTIONS is 0. Do I have to change this to 4? Thank you.

You may have a look at the failsafe settings:
https://ardupilot.org/copter/docs/radio-failsafe.html
https://ardupilot.org/copter/docs/parameters.html#fs-options