Well you really shouldn't ever deposit mining payouts into an exchange wallet anyway. I always see that posted across multiple coins.
You are right, but i did not have such problems before with other coins!
Another surprise is that Southexchange recently has changed the deposit minimum for CBS from 0.1 to 1 coin
So i have already lost a small deposit
http://dl4.joxi.net/drive/2018/01/26/0010/0913/717713/13/bbea7a9a20.jpgand about to lose 0.3 more (amount uncleared on pool)