Ardupilot lost connection with radio

Hi everyone,

I have Pixhawk 6c as control unit. Than i have ELRS module connected to telem2.
Problem is that randomly the control unit loose radio signal and starts to initialize failsafe. But when i change flight mode i instantly regain control a failsafe is cleared. Meanwhile my radio controller is still connected to ELRS module without a problem.

Can somebody help me?

Here are two examples of logs.