I had 1,400 BTC in a wallet that I had not accessed since 2017. I foolishly installed the old version of the electrum wallet. My coins propagated. I attempted to transfer about 1 BTC however was unable to proceed. A pop-up displayed stating I was required to update my security prior to being able to transfer funds.
I installed the update which immediately triggered the transfer of my entire balance to a scammers address.
A recap of the issue by u/_benkaufman – https://twitter.com/_benkaufman/status/1299971319430352897