Disconnecting on Warlock after killing a mob with Drain Soul

Sometimes, after I kill a mob with Drain Soul, I get disconnected and can't connect on that specific character for a while because I get disconnected all the time the moment I log in.
Last time this happened was today (13 - Jan - 23) from 12:15-12:22. Since I have no way of submitting a ticket, I hope this should be sufficient.
Character name - Nargheli

Fixed, it appears that Necrosis caused that issue.

It's because necrosis tries to delete soul shards as per your configuration. If an addon or macro tries to delete too many items at once you get disconnected. So destroy your soul shards and enable necrosis again.