Antennas are REALLY bad to operate around. Guess what has way more power and operates in similar frequency bands as your aircraft? You guessed it, cell phone towers...
I don't know if the log files are available on the P4P as they were on the older devices. This is something you will have to contact DJI about. It is really good that you were able to recover the aircraft. If they find an anomaly in the log file they are pretty good about repairing/replacing. The will likely see the large amounts of interference though and not do much.