App cannot connect to a drone

Hi guys, Last I was flying my I2 and made maps. During the mission I lost connection on my RC (red light) and after some seconds my RC connect to a drone (green light) but DD app lose signal and try to reconnect to a drone. After that my I2 finished the mission and returned to start point. But all this time I did not know what was going on with the drone. I only had information in app “Reconecct to a drone”. Does anyone know the problem ?

It may have been interference in that area at that time.
Does it do it regularly?
Recycling the drone and controller usually clears up things like this.