I use exodus wallet and track the balance in Coinigy. Last week I sent some BTC from that wallet and the next day on Coinigy it showed it as empty. It was in the tens of thousands of dollars missing. I very nearly threw up.
As it turns out, Exodus created a new address and put the remaining balance there at the time I sent the smaller amount out - Coinigy didn't know that, of course.
I have never felt so anxious in my life.