Players are experiencing some hiccups with Mass Effect 3‘s multiplayer; items and unlocked characters have been disappearing.
BioWare says it’s aware of the issues though and is working on a solution.
A suggested temporary fix is to not enter the Store while “ready” for a multiplayer match. Accepting invites while in the Store is also said to cause problems, so it’s best to avoid that.
No word on when a fix might arrive yet.