So far the Steam client has locked-up on me twice. Both times it has been after failing an adventure on pressing the "Regroup!" button. Both times it has been while I was intentionally remaining logged in to avoid resetting shops and adventures. These freezes are different from the perpetual stalls caused by network issues; the program actually becomes unresponsive and needs to be forcefully exited. This isn't something I've ever experienced with the browser versions. EDIT: Experienced another Steam client freeze; this time while attempting to play a trait in my creature deck viewer.