I would actually still be very careful using electron cash. I saw one guy importing his private keys into electron cash and as soon the keys got imported the coins were send to addresses that weren't his. Electrum stated that the version isn't 100% stable yet so be cautious.
was the electron cash software legit or was it malware that behaved in such a way? I think I had the same problem, but my electron cash was downloaded from the correct site. so why did the BTC go to an unknown address?