There is a 99% chance that you got hacked.
If yes, you probably got compromised the private key from this wallet and some hacker has a scrypt to auto withdraw any amont that come to it.
I have come round to this view - I think the wallet was hacked and the hacker setup a script to automatically withdraw anything that was put into it.
This doesn't seem to be a Coinomi issue but we would love to help nevertheless; please open a ticket with our Support at:
https://coinomi.freshdesk.com/support/ and our engineers will do their best to help you resolve your issue. Please also PM us your ticket id once you open the ticket, thanks!
I appreciate the offer but I genuinely don't think the Coinomi wallet was the issue - somehow the Electrum wallet was hacked.
flippener before this incoming transaction which is now gone your Electrum wallet is empty?I see you send all your
BTC before and in that moment everything is normal-but after that did you upgrade your Electrum wallet because I see you are using latest 3.0.3 version?
I think you are download fake Electrum 3.0.3 version maybe and it is just waiting for any incoming transaction,it is happen to many others users because there is so many fake sites which pay to Google to place their ad on the top of search results.Check here :
https://bitcointalksearch.org/topic/phishing-scam-stilling-btc-and-using-electrum-name-be-carefull-2660792If this is not case then you exposed your private keys/seed somewhere where you did not to do that.Too bad that you did not change withdraw address on Poloniex to your primary wallet.
I emptied the Electrum wallet so I could claim Bitcoin Gold without risk to my BTC. Of course, since Poloniex took 2 months to acknowledge my withdrawal I ended up in the situation where it was withdrawing to an old, and now clearly compromised, wallet. I don't know how or where I exposed the private keys but it was to claim a fork, either BTG or another one. I thought that still left only a small chance of being scammed, but clearly not. If seems that if there's even a tiny chance your wallet has been compromised, then it has been.
I have now moved all my BTC into a new Ledger hardware wallet.